Move a bunch of code in content\renderer to the content namespace.

content/renderer/media/media_stream_dispatcher.h

Index: content/renderer/media/media_stream_dispatcher.h
===================================================================
--- content/renderer/media/media_stream_dispatcher.h	(revision 163007)
+++ content/renderer/media/media_stream_dispatcher.h	(working copy)
@@ -22,6 +22,8 @@
 class MessageLoopProxy;
 }
 
+namespace content {
+
 class RenderViewImpl;
 
 // MediaStreamDispatcher is a delegate for the Media Stream API messages.
@@ -30,7 +32,7 @@
 // It's the complement of MediaStreamDispatcherHost (owned by
 // BrowserRenderProcessHost).
 class CONTENT_EXPORT MediaStreamDispatcher
-    : public content::RenderViewObserver,
+    : public RenderViewObserver,
       public base::SupportsWeakPtr<MediaStreamDispatcher> {
  public:
   explicit MediaStreamDispatcher(RenderViewImpl* render_view);
@@ -161,4 +163,6 @@
   DISALLOW_COPY_AND_ASSIGN(MediaStreamDispatcher);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_DISPATCHER_H_