Move a bunch of code in content\common (as well as a few left in renderer) to the content namespace.

content/renderer/websharedworker_proxy.h

Index: content/renderer/websharedworker_proxy.h
===================================================================
--- content/renderer/websharedworker_proxy.h	(revision 163290)
+++ content/renderer/websharedworker_proxy.h	(working copy)
@@ -14,6 +14,8 @@
 #include "ipc/ipc_listener.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebSharedWorker.h"
 
+namespace content {
+
 class ChildThread;
 
 // Implementation of the WebSharedWorker APIs. This object is intended to only
@@ -108,4 +110,6 @@
   DISALLOW_COPY_AND_ASSIGN(WebSharedWorkerProxy);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_RENDERER_WEBSHAREDWORKER_PROXY_H_