[Extensions] Add more bindings access checks

chrome/renderer/extensions/page_capture_custom_bindings.cc

 // 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.
 
 #include "chrome/renderer/extensions/page_capture_custom_bindings.h"
 
 #include "base/bind.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/renderer/render_frame.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/renderer/script_context.h"
 #include "third_party/WebKit/public/web/WebBlob.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
 PageCaptureCustomBindings::PageCaptureCustomBindings(ScriptContext* context)
     : ObjectBackedNativeHandler(context) {
-  RouteFunction("CreateBlob",
-      base::Bind(&PageCaptureCustomBindings::CreateBlob,
-                 base::Unretained(this)));
-  RouteFunction("SendResponseAck",
-      base::Bind(&PageCaptureCustomBindings::SendResponseAck,
-                 base::Unretained(this)));
+  RouteFunction("CreateBlob", "pageCapture",
+                base::Bind(&PageCaptureCustomBindings::CreateBlob,
+                           base::Unretained(this)));
+  RouteFunction("SendResponseAck", "pageCapture",
+                base::Bind(&PageCaptureCustomBindings::SendResponseAck,
+                           base::Unretained(this)));
 }
 
 void PageCaptureCustomBindings::CreateBlob(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   CHECK(args.Length() == 2);
   CHECK(args[0]->IsString());
   CHECK(args[1]->IsInt32());
   blink::WebString path(base::UTF8ToUTF16(*v8::String::Utf8Value(args[0])));
   blink::WebBlob blob =
       blink::WebBlob::createFromFile(path, args[1]->Int32Value());
   args.GetReturnValue().Set(
       blob.toV8Value(context()->v8_context()->Global(), args.GetIsolate()));
 }
 
 void PageCaptureCustomBindings::SendResponseAck(
     const v8::FunctionCallbackInfo<v8::Value>& args) {
   CHECK(args.Length() == 1);
   CHECK(args[0]->IsInt32());
 
   content::RenderFrame* render_frame = context()->GetRenderFrame();
   if (render_frame) {
     render_frame->Send(new ExtensionHostMsg_ResponseAck(
         render_frame->GetRoutingID(), args[0]->Int32Value()));
   }
 }
 
 }  // namespace extensions