Clean up Pepper ImageData resource class.

ppapi/proxy/resource_creation_proxy.cc

Index: ppapi/proxy/resource_creation_proxy.cc
diff --git a/ppapi/proxy/resource_creation_proxy.cc b/ppapi/proxy/resource_creation_proxy.cc
index 6d39f8021d8653a449e5f7e38072be4559336edf..7b4fab6da28074e7ff63ecb2db1ddd121cc6ef2c 100644
--- a/ppapi/proxy/resource_creation_proxy.cc
+++ b/ppapi/proxy/resource_creation_proxy.cc
@@ -253,23 +253,14 @@ PP_Resource ResourceCreationProxy::CreateHostResolverPrivate(
       GetConnection(), instance))->GetReference();
 }
 
-PP_Resource ResourceCreationProxy::CreateImageData(PP_Instance instance,
-                                                   PP_ImageDataFormat format,
-                                                   const PP_Size* size,
-                                                   PP_Bool init_to_zero) {
-  return PPB_ImageData_Proxy::CreateProxyResource(instance, format, *size,
-                                                  init_to_zero);
-}
-
-PP_Resource ResourceCreationProxy::CreateImageDataNaCl(
+PP_Resource ResourceCreationProxy::CreateImageData(
     PP_Instance instance,
+    PPB_ImageData_Shared::ImageDataType type,
     PP_ImageDataFormat format,
     const PP_Size* size,
     PP_Bool init_to_zero) {
-  // These really only are different on the host side. On the plugin side, we
-  // always request a "platform" ImageData if we're trusted, or a "NaCl" one
-  // if we're untrusted (see PPB_ImageData_Proxy::CreateProxyResource()).
-  return CreateImageData(instance, format, size, init_to_zero);
+  return PPB_ImageData_Proxy::CreateProxyResource(instance, type,
+                                                  format, *size, init_to_zero);
 }
 
 PP_Resource ResourceCreationProxy::CreateNetworkMonitor(