Add a Print() method to bindings JS for last resort debugging.

chrome/renderer/extensions/bindings_utils.h

 // Copyright (c) 2011 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 CHROME_RENDERER_EXTENSIONS_BINDINGS_UTILS_H_
 #define CHROME_RENDERER_EXTENSIONS_BINDINGS_UTILS_H_
 #pragma once
 
 #include "base/memory/linked_ptr.h"
 #include "base/memory/singleton.h"
@@ skipping 49 matching lines @@
   // Checks that the current context contains an extension that has permission
   // to execute the specified function. If it does not, a v8 exception is thrown
   // and the method returns false. Otherwise returns true.
   bool CheckPermissionForCurrentContext(const std::string& function_name) const;
 
   // Returns a hidden variable for use by the bindings that is unreachable
   // by the page.
   static v8::Handle<v8::Value> GetChromeHidden(const v8::Arguments& args);
 
   ExtensionDispatcher* extension_dispatcher_;
+
+ private:
+  // Helper to print from bindings javascript.
+  static v8::Handle<v8::Value> Print(const v8::Arguments& args);
 };
 
 const char* GetStringResource(int resource_id);
 
 // Contains information about a single javascript context.
 struct ContextInfo {
   ContextInfo(v8::Persistent<v8::Context> context,
               const std::string& extension_id,
               WebKit::WebFrame* parent_frame,
               RenderView* render_view);
@@ skipping 53 matching lines @@
 // be a sub-property like "Port.dispatchOnMessage". Returns the result of
 // the function call. If an exception is thrown an empty Handle will be
 // returned.
 v8::Handle<v8::Value> CallFunctionInContext(v8::Handle<v8::Context> context,
     const std::string& function_name, int argc,
     v8::Handle<v8::Value>* argv);
 
 }  // namespace bindings_utils
 
 #endif  // CHROME_RENDERER_EXTENSIONS_BINDINGS_UTILS_H_