Switch ContentSettingsObserver to be a RenderFrameObserver instead of a RenderViewObserver

chrome/browser/plugins/chrome_plugin_service_filter.h

Index: chrome/browser/plugins/chrome_plugin_service_filter.h
===================================================================
--- chrome/browser/plugins/chrome_plugin_service_filter.h	(revision 240362)
+++ chrome/browser/plugins/chrome_plugin_service_filter.h	(working copy)
@@ -23,6 +23,10 @@
 class PluginPrefs;
 class Profile;
 
+namespace content {
+class WebContents;
+}
+
 // This class must be created (by calling the |GetInstance| method) on the UI
 // thread, but is safe to use on any thread after that.
 class ChromePluginServiceFilter : public content::PluginServiceFilter,
@@ -55,8 +59,13 @@
   void AuthorizePlugin(int render_process_id,
                        const base::FilePath& plugin_path);
 
-  // Authorizes all plug-ins for a given process.
-  void AuthorizeAllPlugins(int render_process_id);
+  // Authorizes all plug-ins for a given WebContents. If |load_blocked| is true,
+  // then the renderer is told to load the plugin with given |identifier| (or
+  // pllugins if |identifier| is empty).
+  // This method can only be called on the UI thread.
+  void AuthorizeAllPlugins(content::WebContents* web_contents,
+                           bool load_blocked,
+                           const std::string& identifier);
 
   // Returns whether the plugin is found in restricted_plugins_.
   bool IsPluginRestricted(const base::FilePath& plugin_path);