Move host resource from the proxy to the shared_impl.

ppapi/proxy/resource_creation_proxy.h

Index: ppapi/proxy/resource_creation_proxy.h
diff --git a/ppapi/proxy/resource_creation_proxy.h b/ppapi/proxy/resource_creation_proxy.h
index 7a91884a7205a9713cca56628b128e94aed9f8ec..2dacd6ccf9a71ea86b50f9ba8a3fcfcff54f6cb6 100644
--- a/ppapi/proxy/resource_creation_proxy.h
+++ b/ppapi/proxy/resource_creation_proxy.h
@@ -17,10 +17,13 @@
 
 struct PP_Size;
 
+namespace ppapi {
+class HostResource;
+}
+
 namespace pp {
 namespace proxy {
 
-class HostResource;
 class Dispatcher;
 
 class ResourceCreationProxy : public ::ppapi::FunctionGroupBase,
@@ -132,16 +135,16 @@ class ResourceCreationProxy : public ::ppapi::FunctionGroupBase,
   void OnMsgCreateAudio(PP_Instance instance,
                         int32_t sample_rate,
                         uint32_t sample_frame_count,
-                        HostResource* result);
+                        ppapi::HostResource* result);
   void OnMsgCreateGraphics2D(PP_Instance instance,
                              const PP_Size& size,
                              PP_Bool is_always_opaque,
-                             HostResource* result);
+                             ppapi::HostResource* result);
   void OnMsgCreateImageData(PP_Instance instance,
                             int32_t format,
                             const PP_Size& size,
                             PP_Bool init_to_zero,
-                            HostResource* result,
+                            ppapi::HostResource* result,
                             std::string* image_data_desc,
                             ImageHandle* result_image_handle);