Move PopupMenuClient.h to core/html/forms

Source/web/ExternalPopupMenuTest.cpp

 // Copyright (c) 2014 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 "config.h"
 #include "web/ExternalPopupMenu.h"
 
 #include "core/HTMLNames.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/PinchViewport.h"
 #include "core/html/HTMLSelectElement.h"
+#include "core/html/forms/PopupMenuClient.h"
 #include "core/page/Page.h"
 #include "core/rendering/RenderMenuList.h"
 #include "core/testing/URLTestHelpers.h"
 #include "platform/PopupMenu.h"
-#include "platform/PopupMenuClient.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebUnitTestSupport.h"
 #include "public/web/WebExternalPopupMenu.h"
 #include "public/web/WebPopupMenuInfo.h"
 #include "public/web/WebSettings.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/tests/FrameTestHelpers.h"
 #include <gtest/gtest.h>
 
 using namespace blink;
@@ skipping 230 matching lines @@
     ASSERT_TRUE(menuList->popupIsVisible());
 
     WebExternalPopupMenuClient* client = static_cast<ExternalPopupMenu*>(menuList->popup());
     WebVector<int> indices;
     client->didAcceptIndices(indices);
     EXPECT_FALSE(menuList->popupIsVisible());
     EXPECT_EQ(-1, select->selectedIndex());
 }
 
 } // namespace