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

content/common/fileapi/webblobregistry_impl.cc

Index: content/common/fileapi/webblobregistry_impl.cc
===================================================================
--- content/common/fileapi/webblobregistry_impl.cc	(revision 163290)
+++ content/common/fileapi/webblobregistry_impl.cc	(working copy)
@@ -18,6 +18,8 @@
 using WebKit::WebString;
 using WebKit::WebURL;
 
+namespace content {
+
 WebBlobRegistryImpl::WebBlobRegistryImpl(ChildThread* child_thread)
     : child_thread_(child_thread) {
 }
@@ -112,3 +114,5 @@
 void WebBlobRegistryImpl::unregisterBlobURL(const WebURL& url) {
   child_thread_->Send(new BlobHostMsg_RemoveBlob(url));
 }
+
+}  // namespace content