Implementation of device metrics emulation in render view.

content/browser/renderer_host/render_widget_host_view_aura.h

 // 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.
 
 #ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 205 matching lines @@
   virtual void AcceleratedSurfacePostSubBuffer(
       const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params_in_pixel,
       int gpu_host_id) OVERRIDE;
   virtual void AcceleratedSurfaceSuspend() OVERRIDE;
   virtual void AcceleratedSurfaceRelease() OVERRIDE;
   virtual bool HasAcceleratedSurface(const gfx::Size& desired_size) OVERRIDE;
   virtual void GetScreenInfo(WebKit::WebScreenInfo* results) OVERRIDE;
   virtual gfx::Rect GetBoundsInRootWindow() OVERRIDE;
   virtual void GestureEventAck(int gesture_event_type,
                                InputEventAckState ack_result) OVERRIDE;
+  virtual void SetExpectedRenderedSize(const gfx::Size& size) OVERRIDE;
   virtual void ProcessAckedTouchEvent(
       const TouchEventWithLatencyInfo& touch,
       InputEventAckState ack_result) OVERRIDE;
   virtual SyntheticGesture* CreateSmoothScrollGesture(
       bool scroll_down,
       int pixels_to_scroll,
       int mouse_event_x,
       int mouse_event_y) OVERRIDE;
   virtual void SetHasHorizontalScrollbar(
       bool has_horizontal_scrollbar) OVERRIDE;
@@ skipping 415 matching lines @@
   bool accelerated_compositing_state_changed_;
 
   // This lock is the one waiting for a frame of the right size to come back
   // from the renderer/GPU process. It is set from the moment the aura window
   // got resized, to the moment we committed the renderer frame of the same
   // size. It keeps track of the size we expect from the renderer, and locks the
   // compositor, as well as the UI for a short time to give a chance to the
   // renderer of producing a frame of the right size.
   scoped_ptr<ResizeLock> resize_lock_;
 
+  // When emulating screen metrics, renderer may supply image of different size.
+  // Empty size means the default view size is expected.
+  gfx::Size expected_rendered_size_;
+
   // Keeps track of the current frame size.
   gfx::Size current_frame_size_;
 
   // This lock is for waiting for a front surface to become available to draw.
   scoped_refptr<ui::CompositorLock> released_front_lock_;
 
   // Used to track the state of the window we're created from. Only used when
   // created fullscreen.
   scoped_ptr<aura::WindowTracker> host_tracker_;
 
@@ skipping 58 matching lines @@
     unsigned frame_id;
   };
   std::vector<ReleasedFrameInfo> released_software_frames_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAura);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_AURA_H_