Introduce bottom controls to CC and let it respond to scrolling

content/browser/renderer_host/render_widget_host_view_base.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_base.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
@@ skipping 93 matching lines @@
 float RenderWidgetHostViewBase::GetTopControlsHeight() const {
   return 0.f;
 }
 
 void RenderWidgetHostViewBase::SelectionBoundsChanged(
     const ViewHostMsg_SelectionBounds_Params& params) {
   if (GetTextInputManager())
     GetTextInputManager()->SelectionBoundsChanged(this, params);
 }
 
+float RenderWidgetHostViewBase::GetBottomControlsHeight() const {
+  return 0.f;
+}
+
 void RenderWidgetHostViewBase::SelectionChanged(const base::string16& text,
                                                 size_t offset,
                                                 const gfx::Range& range) {
 // TODO(ekaramad): Use TextInputManager code paths for IME on other platforms.
 // Also, remove the following local variables when that happens
 // (https://crbug.com/578168 and https://crbug.com/602427).
 #if defined(USE_AURA)
   if (GetTextInputManager())
     GetTextInputManager()->SelectionChanged(this, text, offset, range);
 #else
@@ skipping 369 matching lines @@
 
 bool RenderWidgetHostViewBase::IsChildFrameForTesting() const {
   return false;
 }
 
 cc::SurfaceId RenderWidgetHostViewBase::SurfaceIdForTesting() const {
   return cc::SurfaceId();
 }
 
 }  // namespace content