[Master/Overview CL] Make PageScaleFactor work for oopif subframe.

content/browser/renderer_host/render_widget_host_delegate.h

Index: content/browser/renderer_host/render_widget_host_delegate.h
diff --git a/content/browser/renderer_host/render_widget_host_delegate.h b/content/browser/renderer_host/render_widget_host_delegate.h
index b63dcbb38eb301ea83335deb45968604c90a9782..9f59d015bb6fd42279c1142846a983ff9deead53 100644
--- a/content/browser/renderer_host/render_widget_host_delegate.h
+++ b/content/browser/renderer_host/render_widget_host_delegate.h
@@ -65,6 +65,9 @@ class CONTENT_EXPORT RenderWidgetHostDelegate {
   // Sets the device scale factor for frames associated with this WebContents.
   virtual void UpdateDeviceScaleFactor(double device_scale_factor) {}
 
+  // Sets the device scale factor for frames associated with this WebContents.
+  virtual void UpdatePageScaleFactor(double page_scale_factor) {}
+
   // Retrieve screen information.
   virtual void GetScreenInfo(ScreenInfo* web_screen_info);