diff --git content/browser/renderer_host/render_widget_host_view_aura.cc content/browser/renderer_host/render_widget_host_view_aura.cc
index edb45db..0dfcfb2 100644
--- content/browser/renderer_host/render_widget_host_view_aura.cc
+++ content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -772,6 +772,13 @@ void RenderWidgetHostViewAura::SetKeyboardFocus() {
       ::SetFocus(host->GetAcceleratedWidget());
   }
 #endif
+#if defined(OS_LINUX)
+  if (has_external_parent_ && CanFocus()) {
+    aura::WindowTreeHost* host = window_->GetHost();
+    if (host)
+      host->Show();
+  }
+#endif
   if (host_ && set_focus_on_mouse_down_) {
     set_focus_on_mouse_down_ = false;
     host_->Focus();
diff --git content/browser/renderer_host/render_widget_host_view_base.cc content/browser/renderer_host/render_widget_host_view_base.cc
index 1c07d7d..47c1911 100644
--- content/browser/renderer_host/render_widget_host_view_base.cc
+++ content/browser/renderer_host/render_widget_host_view_base.cc
@@ -374,6 +374,7 @@ RenderWidgetHostViewBase::RenderWidgetHostViewBase()
       current_device_scale_factor_(0),
       current_display_rotation_(gfx::Display::ROTATE_0),
       pinch_zoom_enabled_(content::IsPinchToZoomEnabled()),
+      has_external_parent_(false),
       renderer_frame_number_(0),
       weak_factory_(this) {
 }
@@ -568,6 +569,10 @@ void RenderWidgetHostViewBase::EndFrameSubscription() {
   NOTREACHED();
 }
 
+void RenderWidgetHostViewBase::SetHasExternalParent(bool val) {
+  has_external_parent_ = val;
+}
+
 uint32 RenderWidgetHostViewBase::RendererFrameNumber() {
   return renderer_frame_number_;
 }
diff --git content/browser/renderer_host/render_widget_host_view_base.h content/browser/renderer_host/render_widget_host_view_base.h
index 1f1e43c..22b5593 100644
--- content/browser/renderer_host/render_widget_host_view_base.h
+++ content/browser/renderer_host/render_widget_host_view_base.h
@@ -78,6 +78,7 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
   void BeginFrameSubscription(
       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) override;
   void EndFrameSubscription() override;
+  void SetHasExternalParent(bool val) override;
 
   // IPC::Listener implementation:
   bool OnMessageReceived(const IPC::Message& msg) override;
@@ -434,6 +435,10 @@ class CONTENT_EXPORT RenderWidgetHostViewBase : public RenderWidgetHostView,
   // renderer.
   bool pinch_zoom_enabled_;
 
+  // True if the widget has a external parent view/window outside of the
+  // Chromium-controlled view/window hierarchy.
+  bool has_external_parent_;
+
  private:
   void FlushInput();
 
diff --git content/public/browser/render_widget_host_view.h content/public/browser/render_widget_host_view.h
index d503fa9..5a7ea6c 100644
--- content/public/browser/render_widget_host_view.h
+++ content/public/browser/render_widget_host_view.h
@@ -146,6 +146,10 @@ class CONTENT_EXPORT RenderWidgetHostView {
   // deleted after this call.
   virtual void EndFrameSubscription() = 0;
 
+  // Set whether the widget has a external parent view/window outside of the
+  // Chromium-controlled view/window hierarchy.
+  virtual void SetHasExternalParent(bool val) = 0;
+
 #if defined(OS_MACOSX)
   // Set the view's active state (i.e., tint state of controls).
   virtual void SetActive(bool active) = 0;
diff --git ui/views/widget/desktop_aura/desktop_screen_win.cc ui/views/widget/desktop_aura/desktop_screen_win.cc
index a8e088c..838b6a0 100644
--- ui/views/widget/desktop_aura/desktop_screen_win.cc
+++ ui/views/widget/desktop_aura/desktop_screen_win.cc
@@ -32,6 +32,8 @@ gfx::Display DesktopScreenWin::GetDisplayMatching(
 }
 
 HWND DesktopScreenWin::GetHWNDFromNativeView(gfx::NativeView window) const {
+  if (!window)
+    return NULL;
   aura::WindowTreeHost* host = window->GetHost();
   return host ? host->GetAcceleratedWidget() : NULL;
 }
diff --git ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
index 48368f9..6a566ba 100644
--- ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
+++ ui/views/widget/desktop_aura/desktop_window_tree_host_win.cc
@@ -85,6 +85,7 @@ DesktopWindowTreeHostWin::DesktopWindowTreeHostWin(
       should_animate_window_close_(false),
       pending_close_(false),
       has_non_client_view_(false),
+      has_external_parent_(false),
       tooltip_(NULL) {
 }
 
@@ -131,8 +132,12 @@ void DesktopWindowTreeHostWin::Init(aura::Window* content_window,
                         native_widget_delegate_);
 
   HWND parent_hwnd = NULL;
-  if (params.parent && params.parent->GetHost())
+  if (params.parent_widget) {
+    parent_hwnd = params.parent_widget;
+    has_external_parent_ = true;
+  } else if (params.parent && params.parent->GetHost()) {
     parent_hwnd = params.parent->GetHost()->GetAcceleratedWidget();
+  }
 
   message_handler_->set_remove_standard_frame(params.remove_standard_frame);
 
@@ -793,11 +798,15 @@ void DesktopWindowTreeHostWin::HandleFrameChanged() {
 }
 
 void DesktopWindowTreeHostWin::HandleNativeFocus(HWND last_focused_window) {
-  // TODO(beng): inform the native_widget_delegate_.
+  // See comments in CefBrowserHostImpl::PlatformSetFocus.
+  if (has_external_parent_ && CanActivate())
+    HandleActivationChanged(true);
 }
 
 void DesktopWindowTreeHostWin::HandleNativeBlur(HWND focused_window) {
-  // TODO(beng): inform the native_widget_delegate_.
+  // See comments in CefBrowserHostImpl::PlatformSetFocus.
+  if (has_external_parent_ && CanActivate())
+    HandleActivationChanged(false);
 }
 
 bool DesktopWindowTreeHostWin::HandleMouseEvent(const ui::MouseEvent& event) {
diff --git ui/views/widget/desktop_aura/desktop_window_tree_host_win.h ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
index 363c019..97ada1d 100644
--- ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
+++ ui/views/widget/desktop_aura/desktop_window_tree_host_win.h
@@ -242,6 +242,10 @@ class VIEWS_EXPORT DesktopWindowTreeHostWin
   // Init time, before the Widget has created the NonClientView.
   bool has_non_client_view_;
 
+  // True if the widget has a external parent view/window outside of the
+  // Chromium-controlled view/window hierarchy.
+  bool has_external_parent_;
+
   // Owned by TooltipController, but we need to forward events to it so we keep
   // a reference.
   corewm::TooltipWin* tooltip_;
diff --git ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
index 656769c..0e5d460 100644
--- ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
+++ ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
@@ -168,6 +168,7 @@ DesktopWindowTreeHostX11::DesktopWindowTreeHostX11(
       use_native_frame_(false),
       should_maximize_after_map_(false),
       use_argb_visual_(false),
+      has_external_parent_(false),
       drag_drop_client_(NULL),
       native_widget_delegate_(native_widget_delegate),
       desktop_native_widget_aura_(desktop_native_widget_aura),
@@ -177,7 +178,8 @@ DesktopWindowTreeHostX11::DesktopWindowTreeHostX11(
       urgency_hint_set_(false),
       activatable_(true),
       modal_dialog_xid_(0),
-      close_widget_factory_(this) {
+      close_widget_factory_(this),
+      xwindow_destroyed_(false) {
 }
 
 DesktopWindowTreeHostX11::~DesktopWindowTreeHostX11() {
@@ -388,7 +390,8 @@ void DesktopWindowTreeHostX11::CloseNow() {
   // Actually free our native resources.
   if (ui::PlatformEventSource::GetInstance())
     ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
-  XDestroyWindow(xdisplay_, xwindow_);
+  if (!xwindow_destroyed_)
+    XDestroyWindow(xdisplay_, xwindow_);
   xwindow_ = None;
 
   desktop_native_widget_aura_->OnHostClosed();
@@ -537,6 +540,8 @@ void DesktopWindowTreeHostX11::GetWindowPlacement(
 }
 
 gfx::Rect DesktopWindowTreeHostX11::GetWindowBoundsInScreen() const {
+  if (!screen_bounds_.IsEmpty())
+    return screen_bounds_;
   return ToDIPRect(bounds_in_pixels_);
 }
 
@@ -974,6 +979,8 @@ void DesktopWindowTreeHostX11::HideImpl() {
 }
 
 gfx::Rect DesktopWindowTreeHostX11::GetBounds() const {
+  if (!screen_bounds_.IsEmpty())
+    return screen_bounds_;
   return bounds_in_pixels_;
 }
 
@@ -1031,6 +1038,8 @@ void DesktopWindowTreeHostX11::SetBounds(
 }
 
 gfx::Point DesktopWindowTreeHostX11::GetLocationOnNativeScreen() const {
+  if (!screen_bounds_.IsEmpty())
+    return screen_bounds_.origin();
   return bounds_in_pixels_.origin();
 }
 
@@ -1135,9 +1144,15 @@ void DesktopWindowTreeHostX11::InitX11Window(
     use_argb_visual_ = true;
   }
 
+  gfx::AcceleratedWidget parent_widget = params.parent_widget;
+  if (parent_widget == gfx::kNullAcceleratedWidget)
+    parent_widget = x_root_window_;
+  else
+    has_external_parent_ = true;
+
   bounds_in_pixels_ = ToPixelRect(params.bounds);
   bounds_in_pixels_.set_size(AdjustSize(bounds_in_pixels_.size()));
-  xwindow_ = XCreateWindow(xdisplay_, x_root_window_, bounds_in_pixels_.x(),
+  xwindow_ = XCreateWindow(xdisplay_, parent_widget, bounds_in_pixels_.x(),
                            bounds_in_pixels_.y(), bounds_in_pixels_.width(),
                            bounds_in_pixels_.height(),
                            0,  // border width
@@ -1766,6 +1781,10 @@ uint32_t DesktopWindowTreeHostX11::DispatchEvent(
       }
       break;
     }
+    case DestroyNotify:
+      xwindow_destroyed_ = true;
+      CloseNow();
+      break;
     case FocusOut:
       if (xev->xfocus.mode != NotifyGrab) {
         ReleaseCapture();
diff --git ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
index c6d9257..0a36f28 100644
--- ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
+++ ui/views/widget/desktop_aura/desktop_window_tree_host_x11.h
@@ -96,6 +96,12 @@ class VIEWS_EXPORT DesktopWindowTreeHostX11
   // there is no dialog on the host window.
   const XID GetModalDialog();
 
+  void set_screen_bounds(const gfx::Rect& bounds) { screen_bounds_ = bounds; }
+
+  // Returns true if the widget has a external parent view/window outside of the
+  // Chromium-controlled view/window hierarchy.
+  bool has_external_parent() const { return has_external_parent_; }
+
  protected:
   // Overridden from DesktopWindowTreeHost:
   void Init(aura::Window* content_window,
@@ -272,6 +278,9 @@ class VIEWS_EXPORT DesktopWindowTreeHostX11
   // The bounds of |xwindow_|.
   gfx::Rect bounds_in_pixels_;
 
+  // Override the screen bounds when the host is a child window.
+  gfx::Rect screen_bounds_;
+
   // Whenever the bounds are set, we keep the previous set of bounds around so
   // we can have a better chance of getting the real
   // |restored_bounds_in_pixels_|. Window managers tend to send a Configure
@@ -308,6 +317,10 @@ class VIEWS_EXPORT DesktopWindowTreeHostX11
   // Whether we used an ARGB visual for our window.
   bool use_argb_visual_;
 
+  // True if the widget has a external parent view/window outside of the
+  // Chromium-controlled view/window hierarchy.
+  bool has_external_parent_;
+
   DesktopDragDropClientAuraX11* drag_drop_client_;
 
   scoped_ptr<ui::EventHandler> x11_non_client_event_filter_;
@@ -364,6 +377,9 @@ class VIEWS_EXPORT DesktopWindowTreeHostX11
 
   base::WeakPtrFactory<DesktopWindowTreeHostX11> close_widget_factory_;
 
+  // True if the xwindow has already been destroyed.
+  bool xwindow_destroyed_;
+
   DISALLOW_COPY_AND_ASSIGN(DesktopWindowTreeHostX11);
 };
 
diff --git ui/views/widget/desktop_aura/x11_desktop_handler.cc ui/views/widget/desktop_aura/x11_desktop_handler.cc
index 9b20295..20b1aec 100644
--- ui/views/widget/desktop_aura/x11_desktop_handler.cc
+++ ui/views/widget/desktop_aura/x11_desktop_handler.cc
@@ -31,6 +31,30 @@ views::X11DesktopHandler* g_handler = NULL;
 
 namespace views {
 
+namespace {
+
+bool IsParentOfWindow(XDisplay* xdisplay,
+                      ::Window potential_parent,
+                      ::Window window) {
+  ::Window parent_win, root_win;
+  Window* child_windows;
+  unsigned int num_child_windows;
+  while (window) {
+    if (!XQueryTree(xdisplay, window, &root_win, &parent_win,
+                    &child_windows, &num_child_windows)) {
+      break;
+    }
+    if(child_windows)
+      XFree(child_windows);
+    if (parent_win == potential_parent)
+      return true;
+    window = parent_win;
+  }
+  return false;
+}
+
+}  // namespace
+
 // static
 X11DesktopHandler* X11DesktopHandler::get() {
   if (!g_handler)
@@ -86,7 +110,11 @@ void X11DesktopHandler::ActivateWindow(::Window window) {
     // in an active X window.
   }
 
-  if (wm_supports_active_window_) {
+  DesktopWindowTreeHostX11* host =
+      DesktopWindowTreeHostX11::GetHostForXID(window);
+  const bool has_external_parent = host && host->has_external_parent();
+
+  if (wm_supports_active_window_ && !has_external_parent) {
     DCHECK_EQ(gfx::GetXDisplay(), xdisplay_);
 
     // If the window is not already active, send a hint to activate it
@@ -175,8 +203,10 @@ uint32_t X11DesktopHandler::DispatchEvent(const ui::PlatformEvent& event) {
         ::Window window;
         if (ui::GetXIDProperty(x_root_window_, "_NET_ACTIVE_WINDOW", &window) &&
             window) {
-          x_active_window_ = window;
-          OnActiveWindowChanged(window, ACTIVE);
+          if (!IsParentOfWindow(xdisplay_, window, current_window_)) {
+            x_active_window_ = window;
+            OnActiveWindowChanged(window, ACTIVE);
+          }
         } else {
           x_active_window_ = None;
         }
diff --git ui/views/widget/widget.cc ui/views/widget/widget.cc
index 6873cde..770e2a9 100644
--- ui/views/widget/widget.cc
+++ ui/views/widget/widget.cc
@@ -125,6 +125,7 @@ Widget::InitParams::InitParams()
       use_system_default_icon(false),
       show_state(ui::SHOW_STATE_DEFAULT),
       parent(nullptr),
+      parent_widget(gfx::kNullAcceleratedWidget),
       native_widget(nullptr),
       native_theme(nullptr),
       desktop_window_tree_host(nullptr),
@@ -150,6 +151,7 @@ Widget::InitParams::InitParams(Type type)
       use_system_default_icon(false),
       show_state(ui::SHOW_STATE_DEFAULT),
       parent(nullptr),
+      parent_widget(gfx::kNullAcceleratedWidget),
       native_widget(nullptr),
       native_theme(nullptr),
       desktop_window_tree_host(nullptr),
@@ -327,7 +329,7 @@ void Widget::Init(const InitParams& in_params) {
   InitParams params = in_params;
 
   params.child |= (params.type == InitParams::TYPE_CONTROL);
-  is_top_level_ = !params.child;
+  is_top_level_ = !params.child || params.parent_widget;
 
   if (params.opacity == views::Widget::InitParams::INFER_OPACITY &&
       params.type != views::Widget::InitParams::TYPE_WINDOW &&
@@ -390,7 +392,12 @@ void Widget::Init(const InitParams& in_params) {
       Minimize();
   } else if (params.delegate) {
     SetContentsView(params.delegate->GetContentsView());
-    SetInitialBoundsForFramelessWindow(params.bounds);
+    if (params.parent_widget) {
+      // Set the bounds directly instead of applying an inset.
+      SetBounds(params.bounds);
+    } else {
+      SetInitialBoundsForFramelessWindow(params.bounds);
+    }
   }
   // This must come after SetContentsView() or it might not be able to find
   // the correct NativeTheme (on Linux). See http://crbug.com/384492
diff --git ui/views/widget/widget.h ui/views/widget/widget.h
index b53bb48..f79ce8f 100644
--- ui/views/widget/widget.h
+++ ui/views/widget/widget.h
@@ -232,6 +232,7 @@ class VIEWS_EXPORT Widget : public internal::NativeWidgetDelegate,
     // Whether the widget should be maximized or minimized.
     ui::WindowShowState show_state;
     gfx::NativeView parent;
+    gfx::AcceleratedWidget parent_widget;
     // Specifies the initial bounds of the Widget. Default is empty, which means
     // the NativeWidget may specify a default size. If the parent is specified,
     // |bounds| is in the parent's coordinate system. If the parent is not