Implementation of device metrics emulation in render view.

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 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 "content/browser/renderer_host/render_widget_host_view_aura.h"
 
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
@@ skipping 782 matching lines @@
 
   if (resize_lock_)
     return false;
 
   if (host_->should_auto_resize())
     return false;
   if (!host_->is_accelerated_compositing_active())
     return false;
 
   gfx::Size desired_size = window_->bounds().size();
+  if (!expected_rendered_size_.IsEmpty())
+    desired_size = expected_rendered_size_;
   if (desired_size == current_frame_size_)
     return false;
 
   aura::RootWindow* root_window = window_->GetRootWindow();
   if (!root_window)
     return false;
 
   ui::Compositor* compositor = root_window->compositor();
   if (!compositor)
     return false;
 
   return true;
 }
 
 scoped_ptr<ResizeLock> RenderWidgetHostViewAura::CreateResizeLock(
     bool defer_compositor_lock) {
   gfx::Size desired_size = window_->bounds().size();
+  if (!expected_rendered_size_.IsEmpty())
+    desired_size = expected_rendered_size_;
   return scoped_ptr<ResizeLock>(new CompositorResizeLock(
       window_->GetRootWindow(),
       desired_size,
       defer_compositor_lock,
       base::TimeDelta::FromMilliseconds(kResizeLockTimeoutMs)));
 }
 
 gfx::NativeView RenderWidgetHostViewAura::GetNativeView() const {
   return window_;
 }
@@ skipping 1245 matching lines @@
   return window_->GetToplevelWindow()->GetBoundsInScreen();
 #endif
 }
 
 void RenderWidgetHostViewAura::GestureEventAck(int gesture_event_type,
                                                InputEventAckState ack_result) {
   if (touch_editing_client_)
     touch_editing_client_->GestureEventAck(gesture_event_type);
 }
 
+void RenderWidgetHostViewAura::SetExpectedRenderedSize(const gfx::Size& size) {
+  expected_rendered_size_ = size;
+}
+
 void RenderWidgetHostViewAura::ProcessAckedTouchEvent(
     const TouchEventWithLatencyInfo& touch, InputEventAckState ack_result) {
   ScopedVector<ui::TouchEvent> events;
   if (!MakeUITouchEventsFromWebTouchEvents(touch, &events,
                                            SCREEN_COORDINATES))
     return;
 
   aura::RootWindow* root = window_->GetRootWindow();
   // |root| is NULL during tests.
   if (!root)
@@ skipping 1274 matching lines @@
     RenderWidgetHost* widget) {
   return new RenderWidgetHostViewAura(widget);
 }
 
 // static
 void RenderWidgetHostViewPort::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content