- Factor platform-specific code out of CefBrowserHostImpl (issue #1749).

- Introduce native/ and osr/ folders for native (non-platform-agnostic) and
    osr (windowless) code respectively.
  - Introduce CefBrowserPlatformDelegate for abstracting platform-specific
    implementations of browser host functionality.
  - Move dialog and menu code to separate manager and platform-specific runner
    implementations exposed via CefBrowserPlatformDelegate.
  - Standardize focus-handling behavior between windowed and windowless
    implementations. CefFocusHandler::OnSetFocus() will now also be called for
    osr focus changes.
- Support multiple simultaneous popups (issue #1289).

libcef/browser/osr/software_output_device_osr.cc

@@ -0,0 +1,114 @@
+// Copyright (c) 2014 The Chromium Embedded Framework Authors.
+// Portions copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "libcef/browser/osr/software_output_device_osr.h"
+
+#include "libcef/browser/browser_host_impl.h"
+#include "libcef/browser/osr/render_widget_host_view_osr.h"
+#include "libcef/browser/thread_util.h"
+
+#include "third_party/skia/include/core/SkDevice.h"
+#include "ui/compositor/compositor.h"
+#include "ui/gfx/skia_util.h"
+
+CefSoftwareOutputDeviceOSR::CefSoftwareOutputDeviceOSR(
+    ui::Compositor* compositor,
+    bool transparent,
+    const OnPaintCallback& callback)
+    : transparent_(transparent),
+      callback_(callback),
+      active_(false) {
+  CEF_REQUIRE_UIT();
+  DCHECK(!callback_.is_null());
+}
+
+CefSoftwareOutputDeviceOSR::~CefSoftwareOutputDeviceOSR() {
+  CEF_REQUIRE_UIT();
+}
+
+void CefSoftwareOutputDeviceOSR::Resize(const gfx::Size& viewport_pixel_size,
+                                        float scale_factor) {
+  CEF_REQUIRE_UIT();
+
+  scale_factor_ = scale_factor;
+
+  if (viewport_pixel_size_ == viewport_pixel_size)
+    return;
+
+  viewport_pixel_size_ = viewport_pixel_size;
+
+  canvas_.reset(NULL);
+  bitmap_.reset(new SkBitmap);
+  bitmap_->allocN32Pixels(viewport_pixel_size.width(),
+                          viewport_pixel_size.height(),
+                          !transparent_);
+  if (bitmap_->drawsNothing()) {
+    NOTREACHED();
+    bitmap_.reset(NULL);
+    return;
+  }
+
+  if (transparent_)
+    bitmap_->eraseARGB(0, 0, 0, 0);
+
+  canvas_.reset(new SkCanvas(*bitmap_.get()));
+}
+
+SkCanvas* CefSoftwareOutputDeviceOSR::BeginPaint(const gfx::Rect& damage_rect) {
+  CEF_REQUIRE_UIT();
+  DCHECK(canvas_.get());
+  DCHECK(bitmap_.get());
+
+  damage_rect_ = damage_rect;
+
+  return canvas_.get();
+}
+
+void CefSoftwareOutputDeviceOSR::EndPaint() {
+  CEF_REQUIRE_UIT();
+  DCHECK(canvas_.get());
+  DCHECK(bitmap_.get());
+
+  if (!bitmap_.get())
+    return;
+
+  cc::SoftwareOutputDevice::EndPaint();
+
+  if (active_)
+    OnPaint(damage_rect_);
+}
+
+void CefSoftwareOutputDeviceOSR::SetActive(bool active) {
+  if (active == active_)
+    return;
+  active_ = active;
+
+  // Call OnPaint immediately if deactivated while a damage rect is pending.
+  if (!active_ && !pending_damage_rect_.IsEmpty())
+    OnPaint(pending_damage_rect_);
+}
+
+void CefSoftwareOutputDeviceOSR::Invalidate(const gfx::Rect& damage_rect) {
+  if (pending_damage_rect_.IsEmpty())
+    pending_damage_rect_ = damage_rect;
+  else
+    pending_damage_rect_.Union(damage_rect);
+}
+
+void CefSoftwareOutputDeviceOSR::OnPaint(const gfx::Rect& damage_rect) {
+  gfx::Rect rect = damage_rect;
+  if (!pending_damage_rect_.IsEmpty()) {
+    rect.Union(pending_damage_rect_);
+    pending_damage_rect_.SetRect(0, 0, 0, 0);
+  }
+
+  rect.Intersect(gfx::Rect(viewport_pixel_size_));
+  if (rect.IsEmpty())
+    return;
+
+  SkAutoLockPixels bitmap_pixels_lock(*bitmap_.get());
+  callback_.Run(rect, bitmap_->width(), bitmap_->height(),
+                bitmap_->getPixels());
+}