Make PageScaleFactor work for oopif subframes.

cc/trees/layer_tree.h

 // Copyright 2016 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.
 
 #ifndef CC_TREES_LAYER_TREE_H_
 #define CC_TREES_LAYER_TREE_H_
 
 #include <memory>
 #include <unordered_map>
 #include <unordered_set>
@@ skipping 72 matching lines @@
     return inputs_.device_viewport_size;
   }
 
   void SetBrowserControlsHeight(float height, bool shrink);
   void SetBrowserControlsShownRatio(float ratio);
   void SetBottomControlsHeight(float height);
 
   void SetPageScaleFactorAndLimits(float page_scale_factor,
                                    float min_page_scale_factor,
                                    float max_page_scale_factor);
+  void SetSubframePageScaleFactor(float sub_frame_page_scale_factor);
   float page_scale_factor() const { return inputs_.page_scale_factor; }
+  float subframe_page_scale_factor() const {
+    return inputs_.subframe_page_scale_factor;
+  }
   float min_page_scale_factor() const { return inputs_.min_page_scale_factor; }
   float max_page_scale_factor() const { return inputs_.max_page_scale_factor; }
 
   void set_background_color(SkColor color) { inputs_.background_color = color; }
   SkColor background_color() const { return inputs_.background_color; }
 
   void set_has_transparent_background(bool transparent) {
     inputs_.has_transparent_background = transparent;
   }
   bool has_transparent_background() const {
@@ skipping 128 matching lines @@
 
     float top_controls_height;
     float top_controls_shown_ratio;
     bool browser_controls_shrink_blink_size;
 
     float bottom_controls_height;
 
     float device_scale_factor;
     float painted_device_scale_factor;
     float page_scale_factor;
+    float subframe_page_scale_factor;
     float min_page_scale_factor;
     float max_page_scale_factor;
     gfx::ColorSpace device_color_space;
 
     SkColor background_color;
     bool has_transparent_background;
 
     LayerSelection selection;
 
     gfx::Size device_viewport_size;
@@ skipping 29 matching lines @@
 
   MutatorHost* mutator_host_;
   LayerTreeHost* layer_tree_host_;
 
   DISALLOW_COPY_AND_ASSIGN(LayerTree);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_H_