Move host resource from the proxy to the shared_impl.

ppapi/proxy/ppb_buffer_proxy.h

Index: ppapi/proxy/ppb_buffer_proxy.h
diff --git a/ppapi/proxy/ppb_buffer_proxy.h b/ppapi/proxy/ppb_buffer_proxy.h
index 18ddafcc1a5d901c554155dbbba336b1a11e7dd8..02e47f883fe25648be1faf3803a588f0f5bc83c2 100644
--- a/ppapi/proxy/ppb_buffer_proxy.h
+++ b/ppapi/proxy/ppb_buffer_proxy.h
@@ -13,15 +13,17 @@
 
 struct PPB_Buffer_Dev;
 
+namespace ppapi {
+class HostResource;
+}
+
 namespace pp {
 namespace proxy {
 
-class HostResource;
-
 class Buffer : public ppapi::thunk::PPB_Buffer_API,
                public PluginResource {
  public:
-  Buffer(const HostResource& resource,
+  Buffer(const ppapi::HostResource& resource,
          const base::SharedMemoryHandle& shm_handle,
          uint32_t size);
   virtual ~Buffer();
@@ -53,7 +55,7 @@ class PPB_Buffer_Proxy : public InterfaceProxy {
 
   static PP_Resource CreateProxyResource(PP_Instance instance,
                                          uint32_t size);
-  static PP_Resource AddProxyResource(const HostResource& resource,
+  static PP_Resource AddProxyResource(const ppapi::HostResource& resource,
                                       base::SharedMemoryHandle shm_handle,
                                       uint32_t size);
 
@@ -68,7 +70,7 @@ class PPB_Buffer_Proxy : public InterfaceProxy {
   // Message handlers.
   void OnMsgCreate(PP_Instance instance,
                    uint32_t size,
-                   HostResource* result_resource,
+                   ppapi::HostResource* result_resource,
                    base::SharedMemoryHandle* result_shm_handle);
 };