Move host resource from the proxy to the shared_impl.

ppapi/proxy/ppb_testing_proxy.h

Index: ppapi/proxy/ppb_testing_proxy.h
diff --git a/ppapi/proxy/ppb_testing_proxy.h b/ppapi/proxy/ppb_testing_proxy.h
index 352a2aea9d2426ccb0770c9e95c2d89013299877..d1057697e898868a167d34148ac9cebfe694a1df 100644
--- a/ppapi/proxy/ppb_testing_proxy.h
+++ b/ppapi/proxy/ppb_testing_proxy.h
@@ -8,8 +8,8 @@
 #include "base/basictypes.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_resource.h"
-#include "ppapi/proxy/host_resource.h"
 #include "ppapi/proxy/interface_proxy.h"
+#include "ppapi/shared_impl/host_resource.h"
 
 struct PP_Point;
 struct PPB_Testing_Dev;
@@ -33,8 +33,8 @@ class PPB_Testing_Proxy : public InterfaceProxy {
 
  private:
   // Message handlers.
-  void OnMsgReadImageData(const HostResource& device_context_2d,
-                          const HostResource& image,
+  void OnMsgReadImageData(const ppapi::HostResource& device_context_2d,
+                          const ppapi::HostResource& image,
                           const PP_Point& top_left,
                           PP_Bool* result);
   void OnMsgRunMessageLoop(PP_Instance instance);