Enable clear cache/cookies support in developer tools

content/browser/debugger/devtools_window.cc

 // 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.
 
 #include "base/command_line.h"
 #include "base/json/json_writer.h"
 #include "base/stringprintf.h"
 #include "base/string_number_conversions.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
@@ skipping 454 matching lines @@
   if (docked_) {
     if (event.windowsKeyCode == 0x08) {
       // Do not navigate back in history on Windows (http://crbug.com/74156).
       return;
     }
     BrowserWindow* inspected_window = GetInspectedBrowserWindow();
     if (inspected_window)
       inspected_window->HandleKeyboardEvent(event);
   }
 }
+
+content::JavaScriptDialogCreator* DevToolsWindow::GetJavaScriptDialogCreator() {
+  if (inspected_tab_) {
+    return inspected_tab_->tab_contents()->delegate()->
+            GetJavaScriptDialogCreator();
+  }
+  return TabContentsDelegate::GetJavaScriptDialogCreator();
+}