Make the Pepper proxy support in-process font rendering.

content/ppapi_plugin/ppapi_thread.h

Index: content/ppapi_plugin/ppapi_thread.h
===================================================================
--- content/ppapi_plugin/ppapi_thread.h	(revision 84549)
+++ content/ppapi_plugin/ppapi_thread.h	(working copy)
@@ -17,6 +17,7 @@
 #include "ppapi/c/trusted/ppp_broker.h"
 
 class FilePath;
+class PpapiWebKitThread;
 
 namespace IPC {
 struct ChannelHandle;
@@ -36,6 +37,8 @@
   virtual base::MessageLoopProxy* GetIPCMessageLoop();
   virtual base::WaitableEvent* GetShutdownEvent();
   virtual std::set<PP_Instance>* GetGloballySeenInstanceIDSet();
+  virtual void PostToWebKitThread(const tracked_objects::Location& from_here,
+                                  const base::Closure& task);
 
   // Message handlers.
   void OnMsgLoadPlugin(const FilePath& path);
@@ -70,6 +73,8 @@
   // See Dispatcher::Delegate::GetGloballySeenInstanceIDSet.
   std::set<PP_Instance> globally_seen_instance_ids_;
 
+  scoped_ptr<PpapiWebKitThread> webkit_thread_;
+
   DISALLOW_IMPLICIT_CONSTRUCTORS(PpapiThread);
 };