Move host resource from the proxy to the shared_impl.

ppapi/proxy/ppb_pdf_proxy.h

Index: ppapi/proxy/ppb_pdf_proxy.h
diff --git a/ppapi/proxy/ppb_pdf_proxy.h b/ppapi/proxy/ppb_pdf_proxy.h
index dbafd2d8c9115586531d15aa32b2d691b2b655fb..f0aba4050b62e28f7928a1f7093a810a33bbc650 100644
--- a/ppapi/proxy/ppb_pdf_proxy.h
+++ b/ppapi/proxy/ppb_pdf_proxy.h
@@ -6,8 +6,8 @@
 #define PPAPI_PPB_PDF_PROXY_H_
 
 #include "ppapi/c/pp_module.h"
-#include "ppapi/proxy/host_resource.h"
 #include "ppapi/proxy/interface_proxy.h"
+#include "ppapi/shared_impl/host_resource.h"
 
 struct PPB_PDF;
 
@@ -35,8 +35,8 @@ class PPB_PDF_Proxy : public InterfaceProxy {
   void OnMsgGetFontFileWithFallback(PP_Module module,
                                     const SerializedFontDescription& desc,
                                     int32_t charset,
-                                    HostResource* result);
-  void OnMsgGetFontTableForPrivateFontFile(const HostResource& font_file,
+                                    ppapi::HostResource* result);
+  void OnMsgGetFontTableForPrivateFontFile(const ppapi::HostResource& font_file,
                                            uint32_t table,
                                            std::string* result);
 };