Fix page zoom to be frame-centric for out-of-process frames.

content/public/common/renderer_preferences.h

Index: content/public/common/renderer_preferences.h
diff --git a/content/public/common/renderer_preferences.h b/content/public/common/renderer_preferences.h
index 2b085ae17cebf2433e201c18b21047f713702044..73d215a6731caa2cb2f94126ddc9879b3a2b3121 100644
--- a/content/public/common/renderer_preferences.h
+++ b/content/public/common/renderer_preferences.h
@@ -102,9 +102,6 @@ struct CONTENT_EXPORT RendererPreferences {
   // in webrtc_ip_handling_policy.h.
   std::string webrtc_ip_handling_policy;
 
-  // Default page zoom level.
-  double default_zoom_level;
-
   // The user agent given to WebKit when it requests one and the user agent is
   // being overridden for the current navigation.
   std::string user_agent_override;