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

content/renderer/websharedworkerrepository_impl.h

Index: content/renderer/websharedworkerrepository_impl.h
===================================================================
--- content/renderer/websharedworkerrepository_impl.h	(revision 163290)
+++ content/renderer/websharedworkerrepository_impl.h	(working copy)
@@ -13,6 +13,8 @@
 class WebSharedWorker;
 }
 
+namespace content {
+
 class WebSharedWorkerRepositoryImpl : public WebKit::WebSharedWorkerRepository {
  public:
   WebSharedWorkerRepositoryImpl();
@@ -31,4 +33,6 @@
   DocumentSet shared_worker_parents_;
 };
 
+}  // namespace content
+
 #endif  // CONTENT_RENDERER_WEBSHAREDWORKERREPOSITORY_IMPL_H_