Restore resize throttling on Chrome OS

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/auto_reset.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 760 matching lines @@
   return window_->GetBoundsInScreen();
 }
 
 void RenderWidgetHostViewAura::SetBackgroundOpaque(bool opaque) {
   RenderWidgetHostViewBase::SetBackgroundOpaque(opaque);
   host_->SetBackgroundOpaque(opaque);
   window_->layer()->SetFillsBoundsOpaquely(opaque);
 }
 
 gfx::Size RenderWidgetHostViewAura::GetVisibleViewportSize() const {
-  gfx::Rect window_bounds = window_->bounds();
-  int viewport_width = std::max(
-      0, window_bounds.width() - insets_.left() - insets_.right());
-  int viewport_height = std::max(
-      0, window_bounds.height() - insets_.top() - insets_.bottom());
-  return gfx::Size(viewport_width, viewport_height);
+  gfx::Rect requested_rect(GetRequestedRendererSize());
+  requested_rect.Inset(insets_);
+  return requested_rect.size();
 }
 
 void RenderWidgetHostViewAura::SetInsets(const gfx::Insets& insets) {
   if (insets != insets_) {
     insets_ = insets;
     host_->WasResized();
   }
 }
 
 void RenderWidgetHostViewAura::UpdateCursor(const WebCursor& cursor) {
@@ skipping 91 matching lines @@
   }
 
   // Set the CLIPBOARD_TYPE_SELECTION to the ui::Clipboard.
   ui::ScopedClipboardWriter clipboard_writer(
       ui::Clipboard::GetForCurrentThread(),
       ui::CLIPBOARD_TYPE_SELECTION);
   clipboard_writer.WriteText(text.substr(pos, n));
 #endif  // defined(USE_X11) && !defined(OS_CHROMEOS)
 }
 
+gfx::Size RenderWidgetHostViewAura::GetRequestedRendererSize() const {
+  return delegated_frame_host_->GetRequestedRendererSize();
+}
+
 void RenderWidgetHostViewAura::SelectionBoundsChanged(
     const ViewHostMsg_SelectionBounds_Params& params) {
   if (selection_anchor_rect_ == params.anchor_rect &&
       selection_focus_rect_ == params.focus_rect)
     return;
 
   selection_anchor_rect_ = params.anchor_rect;
   selection_focus_rect_ = params.focus_rect;
 
   if (GetInputMethod())
@@ skipping 1471 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content