Pepper proxy: make the browser sender handle the proxy lock properly.

ppapi/proxy/plugin_main_nacl.cc

Index: ppapi/proxy/plugin_main_nacl.cc
diff --git a/ppapi/proxy/plugin_main_nacl.cc b/ppapi/proxy/plugin_main_nacl.cc
index 67470fe55a1c4562b29f2485f407dcd514053dbc..8077bdf64566151062168f82c393d0c235392480 100644
--- a/ppapi/proxy/plugin_main_nacl.cc
+++ b/ppapi/proxy/plugin_main_nacl.cc
@@ -72,7 +72,6 @@ class PpapiDispatcher : public ProxyChannel,
   virtual void Unregister(uint32 plugin_dispatcher_id) OVERRIDE;
 
   // PluginProxyDelegate implementation.
-  virtual bool SendToBrowser(IPC::Message* msg) OVERRIDE;
   virtual IPC::Sender* GetBrowserSender() OVERRIDE;
   virtual std::string GetUILanguage() OVERRIDE;
   virtual void PreCacheFont(const void* logfontw) OVERRIDE;
@@ -144,10 +143,6 @@ void PpapiDispatcher::Unregister(uint32 plugin_dispatcher_id) {
   plugin_dispatchers_.erase(plugin_dispatcher_id);
 }
 
-bool PpapiDispatcher::SendToBrowser(IPC::Message* msg) {
-  return Send(msg);
-}
-
 IPC::Sender* PpapiDispatcher::GetBrowserSender() {
   return this;
 }