Plumb physical backing size from RWHV to renderer CC.

content/renderer/render_widget.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/renderer/render_widget.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
@@ skipping 310 matching lines @@
   }
 
   // If given a messsage without a routing ID, then assign our routing ID.
   if (message->routing_id() == MSG_ROUTING_NONE)
     message->set_routing_id(routing_id_);
 
   return RenderThread::Get()->Send(message);
 }
 
 void RenderWidget::Resize(const gfx::Size& new_size,
+                          const gfx::Size& physical_backing_size,
                           const gfx::Rect& resizer_rect,
                           bool is_fullscreen,
                           ResizeAck resize_ack) {
   // A resize ack shouldn't be requested if we have not ACK'd the previous one.
   DCHECK(resize_ack != SEND_RESIZE_ACK || !next_paint_is_resize_ack());
   DCHECK(resize_ack == SEND_RESIZE_ACK || resize_ack == NO_RESIZE_ACK);
 
   // Ignore this during shutdown.
   if (!webwidget_)
     return;
 
-  // Remember the rect where the resize corner will be drawn.
+  if (size_ != new_size || physical_backing_size_ != physical_backing_size_)
+    compositor_->setViewportSize(new_size, physical_backing_size);
+
+  physical_backing_size_ = physical_backing_size_;
   resizer_rect_ = resizer_rect;
 
   // NOTE: We may have entered fullscreen mode without changing our size.
   bool fullscreen_change = is_fullscreen_ != is_fullscreen;
   if (fullscreen_change)
     WillToggleFullscreen();
   is_fullscreen_ = is_fullscreen;
 
   if (size_ != new_size) {
     // TODO(darin): We should not need to reset this here.
@@ skipping 53 matching lines @@
 
 // Got a response from the browser after the renderer decided to create a new
 // view.
 void RenderWidget::OnCreatingNewAck() {
   DCHECK(routing_id_ != MSG_ROUTING_NONE);
 
   CompleteInit();
 }
 
 void RenderWidget::OnResize(const gfx::Size& new_size,
+                            const gfx::Size& physical_backing_size,
                             const gfx::Rect& resizer_rect,
                             bool is_fullscreen) {
-  Resize(new_size, resizer_rect, is_fullscreen, SEND_RESIZE_ACK);
+  Resize(new_size, physical_backing_size, resizer_rect, is_fullscreen,
+         SEND_RESIZE_ACK);
 }
 
 void RenderWidget::OnChangeResizeRect(const gfx::Rect& resizer_rect) {
   if (resizer_rect_ != resizer_rect) {
     gfx::Rect view_rect(size_);
 
     gfx::Rect old_damage_rect = gfx::IntersectRects(view_rect, resizer_rect_);
     if (!old_damage_rect.IsEmpty())
       paint_aggregator_.InvalidateRect(old_damage_rect);
 
@@ skipping 1708 matching lines @@
 bool RenderWidget::WillHandleGestureEvent(
     const WebKit::WebGestureEvent& event) {
   return false;
 }
 
 bool RenderWidget::HasTouchEventHandlersAt(const gfx::Point& point) const {
   return true;
 }
 
 }  // namespace content