Add Query() support to FileRef

ppapi/proxy/enter_proxy.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PPAPI_PROXY_ENTER_PROXY_H_
 #define PPAPI_PROXY_ENTER_PROXY_H_
 
 #include "base/logging.h"
 #include "ppapi/cpp/completion_callback.h"
 #include "ppapi/proxy/host_dispatcher.h"
@@ skipping 133 matching lines @@
       Method method,
       const A& a,
       const B& b)
       : EnterHostFromHostResource<ResourceT>(host_resource,
             factory.NewOptionalCallback(method, a, b)),
         needs_running_(true) {
     if (this->failed())
       RunCallback(PP_ERROR_BADRESOURCE);
   }
 
+  // For callbacks that take three extra parameters as a closure.
+  template<class CallbackFactory, typename Method, typename A, typename B,
+           typename C>
+  EnterHostFromHostResourceForceCallback(
+      const HostResource& host_resource,
+      CallbackFactory& factory,
+      Method method,
+      const A& a,
+      const B& b,
+      const C& c)
+      : EnterHostFromHostResource<ResourceT>(host_resource,
+            factory.NewOptionalCallback(method, a, b, c)),
+        needs_running_(true) {
+    if (this->failed())
+      RunCallback(PP_ERROR_BADRESOURCE);
+  }
+
   ~EnterHostFromHostResourceForceCallback() {
     if (needs_running_) {
       NOTREACHED() << "Should always call SetResult except in the "
                       "initialization failed case.";
       RunCallback(PP_ERROR_FAILED);
     }
   }
 
   void SetResult(int32_t result) {
     DCHECK(needs_running_) << "Don't call SetResult when there already is one.";
@@ skipping 14 matching lines @@
     this->ClearCallback();
   }
 
   bool needs_running_;
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_ENTER_PROXY_H_