Move ContextMenuParams struct from webkit/glue to content/public/common. The reasons are:

webkit/tools/test_shell/test_webview_delegate.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.
 
 // This file contains the implementation of TestWebViewDelegate, which serves
 // as the WebViewDelegate for the TestShellWebHost.  The host is expected to
 // have initialized a MessageLoop before these methods are called.
 
 #include "webkit/tools/test_shell/test_webview_delegate.h"
 
@@ skipping 477 matching lines @@
     return true;
   }
   return false;
 }
 
 bool TestWebViewDelegate::runModalBeforeUnloadDialog(
     WebFrame* frame, const WebString& message) {
   return true;  // Allow window closure.
 }
 
-void TestWebViewDelegate::showContextMenu(
-    WebFrame* frame, const WebContextMenuData& data) {
-  CapturedContextMenuEvent context(data.mediaType,
-                                   data.mousePosition.x,
-                                   data.mousePosition.y);
-  captured_context_menu_events_.push_back(context);
-  last_context_menu_data_.reset(new WebContextMenuData(data));
-}
-
-void TestWebViewDelegate::ClearContextMenuData() {
-  last_context_menu_data_.reset();
-}
-
 
 
 
 void TestWebViewDelegate::setStatusText(const WebString& text) {
 }
 
 void TestWebViewDelegate::startDragging(
     const WebDragData& data,
     WebDragOperationsMask mask,
     const WebImage& image,
@@ skipping 636 matching lines @@
 }
 
 void TestWebViewDelegate::set_fake_window_rect(const WebRect& rect) {
   fake_rect_ = rect;
   using_fake_rect_ = true;
 }
 
 WebRect TestWebViewDelegate::fake_window_rect() {
   return fake_rect_;
 }