Add support for calculating the position of the top controls in the cc layer.

content/port/browser/render_widget_host_view_port.h

Index: content/port/browser/render_widget_host_view_port.h
diff --git a/content/port/browser/render_widget_host_view_port.h b/content/port/browser/render_widget_host_view_port.h
index 0da1bc0c7c2a11500b450664603949b2f06d479a..a2f4adb1aa8cfd7989654ae28635235aa382b9c3 100644
--- a/content/port/browser/render_widget_host_view_port.h
+++ b/content/port/browser/render_widget_host_view_port.h
@@ -237,7 +237,9 @@ class CONTENT_EXPORT RenderWidgetHostViewPort : public RenderWidgetHostView {
                                float page_scale_factor,
                                float min_page_scale_factor,
                                float max_page_scale_factor,
-                               const gfx::Size& content_size) = 0;
+                               const gfx::Size& content_size,
+                               const gfx::Vector2dF& controls_offset,
+                               const gfx::Vector2dF& content_offset) = 0;
   virtual void HasTouchEventHandlers(bool need_touch_events) = 0;
 #endif