Introduce bottom controls to CC and let it respond to scrolling

content/browser/devtools/protocol/page_handler.cc

 // Copyright 2014 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/devtools/protocol/page_handler.h"
 
 #include <string>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 466 matching lines @@
     --frames_in_flight_;
     return;
   }
 
   gfx::SizeF screen_size_dip =
       gfx::ScaleSize(gfx::SizeF(view->GetPhysicalBackingSize()),
                      1 / metadata.device_scale_factor);
   scoped_refptr<ScreencastFrameMetadata> param_metadata =
       ScreencastFrameMetadata::Create()
           ->set_page_scale_factor(metadata.page_scale_factor)
-          ->set_offset_top(metadata.location_bar_content_translation.y())
+          ->set_offset_top(metadata.top_controls_height.y() *
+                           metadata.top_controls_shown_ratio)
           ->set_device_width(screen_size_dip.width())
           ->set_device_height(screen_size_dip.height())
           ->set_scroll_offset_x(metadata.root_scroll_offset.x())
           ->set_scroll_offset_y(metadata.root_scroll_offset.y())
           ->set_timestamp(timestamp.ToDoubleT());
   client_->ScreencastFrame(ScreencastFrameParams::Create()
       ->set_data(data)
       ->set_metadata(param_metadata)
       ->set_session_id(session_id_));
 }
@@ skipping 18 matching lines @@
 
 void PageHandler::OnColorPicked(int r, int g, int b, int a) {
   scoped_refptr<dom::RGBA> color =
       dom::RGBA::Create()->set_r(r)->set_g(g)->set_b(b)->set_a(a);
   client_->ColorPicked(ColorPickedParams::Create()->set_color(color));
 }
 
 }  // namespace page
 }  // namespace devtools
 }  // namespace content