Convert the pp::proxy namespace to the ppapi::proxy namespace.

content/ppapi_plugin/plugin_process_dispatcher.h

Index: content/ppapi_plugin/plugin_process_dispatcher.h
diff --git a/content/ppapi_plugin/plugin_process_dispatcher.h b/content/ppapi_plugin/plugin_process_dispatcher.h
index 309fe1ab5b93b5910e6bb17ffd9f70dead9251c9..ffcdc48e0104eae3bec8f5e419ffb6dc08637746 100644
--- a/content/ppapi_plugin/plugin_process_dispatcher.h
+++ b/content/ppapi_plugin/plugin_process_dispatcher.h
@@ -11,7 +11,7 @@
 // Wrapper around a PluginDispatcher that provides the necessary integration
 // for plugin process management. This class is to avoid direct dependencies
 // from the PPAPI proxy on the Chrome multiprocess infrastructure.
-class PluginProcessDispatcher : public pp::proxy::PluginDispatcher {
+class PluginProcessDispatcher : public ppapi::proxy::PluginDispatcher {
  public:
   PluginProcessDispatcher(base::ProcessHandle remote_process_handle,
                           GetInterfaceFunc get_interface);