Move the MediaObserver getter from ResourceContext to ContentBrowserClient, since we only need to s…

content/public/browser/content_browser_client.h

Index: content/public/browser/content_browser_client.h
===================================================================
--- content/public/browser/content_browser_client.h	(revision 128803)
+++ content/public/browser/content_browser_client.h	(working copy)
@@ -63,10 +63,11 @@
 class BrowserChildProcessHost;
 class BrowserContext;
 class BrowserMainParts;
+class MediaObserver;
+class QuotaPermissionContext;
 class RenderProcessHost;
-class QuotaPermissionContext;
+class RenderViewHost;
 class ResourceContext;
-class RenderViewHost;
 class SiteInstance;
 class SpeechInputManagerDelegate;
 class WebContents;
@@ -292,6 +293,10 @@
       int render_process_id,
       int render_view_id) = 0;
 
+  // Returns a a class to get notifications about media event. The embedder can
+  // return NULL if they're not interested.
+  virtual MediaObserver* GetMediaObserver() = 0;
+
   // Asks permission to use the camera and/or microphone. If permission is
   // granted, a call should be made to |callback| with the devices. If the
   // request is denied, a call should be made to |callback| with an empty list