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

chrome/browser/ui/webui/task_manager_dialog.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/browser/ui/webui/task_manager_dialog.h"
 
 #include "base/bind.h"
 #include "base/memory/singleton.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 76 matching lines @@
   virtual void OnDialogClosed(const std::string& json_retval) OVERRIDE {
     OnCloseDialog();
   }
   virtual void OnCloseContents(WebContents* source, bool* out_close_dialog)
       OVERRIDE {
     *out_close_dialog = true;
   }
   virtual bool ShouldShowDialogTitle() const OVERRIDE {
     return false;
   }
-  virtual bool HandleContextMenu(const ContextMenuParams& params) OVERRIDE {
+  virtual bool HandleContextMenu(
+      const content::ContextMenuParams& params) OVERRIDE {
     return true;
   }
   virtual void StoreDialogSize(const gfx::Size& dialog_size) OVERRIDE {
    // Store the dialog's bounds so that it can be restored with the same bounds
    // the next time it's opened.
    if (g_browser_process->local_state()) {
      DictionaryPrefUpdate update(g_browser_process->local_state(),
                                  prefs::kTaskManagerWindowPlacement);
      DictionaryValue* placement_pref = update.Get();
      placement_pref->SetInteger("width", dialog_size.width());
@@ skipping 77 matching lines @@
       BrowserThread::UI, FROM_HERE,
       base::Bind(&TaskManagerDialogImpl::Show, false));
 }
 
 // static
 void TaskManagerDialog::ShowBackgroundPages() {
   BrowserThread::PostTask(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&TaskManagerDialogImpl::Show, true));
 }