PluginResource: Avoid having two sets of similar methods for talking with browser and renderer.

ppapi/proxy/file_chooser_resource.cc

Index: ppapi/proxy/file_chooser_resource.cc
diff --git a/ppapi/proxy/file_chooser_resource.cc b/ppapi/proxy/file_chooser_resource.cc
index f41ade58b8a87d93c3bd2ccf74184a3e820eb694..5c110125d07c1ff1c9234979c30c5eb0152338b8 100644
--- a/ppapi/proxy/file_chooser_resource.cc
+++ b/ppapi/proxy/file_chooser_resource.cc
@@ -130,7 +130,7 @@ int32_t FileChooserResource::ShowInternal(
     return PP_ERROR_INPROGRESS;
 
   if (!sent_create_to_renderer())
-    SendCreateToRenderer(PpapiHostMsg_FileChooser_Create());
+    SendCreate(RENDERER, PpapiHostMsg_FileChooser_Create());
 
   callback_ = callback;
   StringVar* sugg_str = StringVar::FromPPVar(suggested_file_name);
@@ -140,7 +140,7 @@ int32_t FileChooserResource::ShowInternal(
         mode_ == PP_FILECHOOSERMODE_OPENMULTIPLE,
         sugg_str ? sugg_str->value() : std::string(),
         accept_types_);
-  CallRenderer<PpapiPluginMsg_FileChooser_ShowReply>(msg,
+  Call<PpapiPluginMsg_FileChooser_ShowReply>(RENDERER, msg,
       base::Bind(&FileChooserResource::OnPluginMsgShowReply, this));
   return PP_OK_COMPLETIONPENDING;
 }