Index: desktop_aura/desktop_screen_win.cc
===================================================================
--- desktop_aura/desktop_screen_win.cc	(revision 261035)
+++ desktop_aura/desktop_screen_win.cc	(working copy)
@@ -54,6 +54,8 @@
 }
 
 HWND DesktopScreenWin::GetHWNDFromNativeView(gfx::NativeView window) const {
+  if (!window)
+    return NULL;
   aura::WindowTreeHost* host = window->GetHost();
   return host ? host->GetAcceleratedWidget() : NULL;
 }
Index: desktop_aura/desktop_window_tree_host_win.cc
===================================================================
--- desktop_aura/desktop_window_tree_host_win.cc	(revision 261035)
+++ desktop_aura/desktop_window_tree_host_win.cc	(working copy)
@@ -130,7 +130,9 @@
                         native_widget_delegate_);
 
   HWND parent_hwnd = NULL;
-  if (params.parent && params.parent->GetHost())
+  if (params.parent_widget)
+    parent_hwnd = params.parent_widget;
+  else if (params.parent && params.parent->GetHost())
     parent_hwnd = params.parent->GetHost()->GetAcceleratedWidget();
 
   message_handler_->set_remove_standard_frame(params.remove_standard_frame);
Index: desktop_aura/desktop_window_tree_host_win.h
===================================================================
--- desktop_aura/desktop_window_tree_host_win.h	(revision 261035)
+++ desktop_aura/desktop_window_tree_host_win.h	(working copy)
@@ -214,6 +214,7 @@
                              LPARAM l_param) OVERRIDE;
   virtual bool HandleScrollEvent(const ui::ScrollEvent& event) OVERRIDE;
 
+ public:
   Widget* GetWidget();
   const Widget* GetWidget() const;
   HWND GetHWND() const;
Index: widget.cc
===================================================================
--- widget.cc	(revision 261035)
+++ widget.cc	(working copy)
@@ -122,6 +122,7 @@
       show_state(ui::SHOW_STATE_DEFAULT),
       double_buffer(false),
       parent(NULL),
+      parent_widget(NULL),
       native_widget(NULL),
       desktop_window_tree_host(NULL),
       top_level(false),
@@ -148,6 +149,7 @@
       show_state(ui::SHOW_STATE_DEFAULT),
       double_buffer(false),
       parent(NULL),
+      parent_widget(NULL),
       native_widget(NULL),
       desktop_window_tree_host(NULL),
       top_level(false),
@@ -386,7 +388,12 @@
       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);
+    }
   }
   native_widget_initialized_ = true;
 }
Index: widget.h
===================================================================
--- widget.h	(revision 261035)
+++ widget.h	(working copy)
@@ -200,6 +200,7 @@
     // Should the widget be double buffered? Default is false.
     bool double_buffer;
     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