Move content's a plugin, ppapi_plugin, utility, and worker subdirectories to the content namespace.

content/ppapi_plugin/broker_process_dispatcher.cc

Index: content/ppapi_plugin/broker_process_dispatcher.cc
===================================================================
--- content/ppapi_plugin/broker_process_dispatcher.cc	(revision 163080)
+++ content/ppapi_plugin/broker_process_dispatcher.cc	(working copy)
@@ -13,6 +13,7 @@
 #include "ppapi/c/private/ppp_flash_browser_operations.h"
 #include "ppapi/proxy/ppapi_messages.h"
 
+namespace content {
 namespace {
 
 // How long we wait before releasing the broker process.
@@ -328,3 +329,5 @@
 
   return false;
 }
+
+}  // namespace content