Make PageScaleFactor work for oopif subframes.

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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/gpu/render_widget_compositor.h"
 
 #include <stddef.h>
 
 #include <cmath>
 #include <limits>
@@ skipping 686 matching lines @@
   layer_tree_host_->GetLayerTree()->set_has_transparent_background(transparent);
 }
 
 void RenderWidgetCompositor::setVisible(bool visible) {
   if (never_visible_)
     return;
 
   layer_tree_host_->SetVisible(visible);
 }
 
+float RenderWidgetCompositor::pageScaleFactor() {
+  return layer_tree_host()->GetLayerTree()->page_scale_factor();
+}
+
+void RenderWidgetCompositor::SetPageScaleFactorForSubframe(float scale) {
+  layer_tree_host()->GetLayerTree()->SetSubframePageScaleFactor(scale);
+}
+
 void RenderWidgetCompositor::setPageScaleFactorAndLimits(
     float page_scale_factor, float minimum, float maximum) {
   layer_tree_host_->GetLayerTree()->SetPageScaleFactorAndLimits(
       page_scale_factor, minimum, maximum);
 }
 
 void RenderWidgetCompositor::startPageScaleAnimation(
     const blink::WebPoint& destination,
     bool use_anchor,
     float new_page_scale,
@@ skipping 417 matching lines @@
 void RenderWidgetCompositor::SetDeviceColorSpace(
     const gfx::ColorSpace& color_space) {
   layer_tree_host_->GetLayerTree()->SetDeviceColorSpace(color_space);
 }
 
 void RenderWidgetCompositor::SetIsForOopif(bool is_for_oopif) {
   is_for_oopif_ = is_for_oopif;
 }
 
 }  // namespace content