Made top controls work with virtual viewport pinch-to-zoom. (Blink)

Source/web/tests/FrameTestHelpers.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef FrameTestHelpers_h
 #define FrameTestHelpers_h
 
+#include "core/frame/Settings.h"
+#include "platform/scroll/ScrollbarTheme.h"
 #include "public/platform/WebURLRequest.h"
 #include "public/web/WebFrameClient.h"
 #include "public/web/WebHistoryItem.h"
 #include "public/web/WebRemoteFrameClient.h"
 #include "public/web/WebViewClient.h"
 #include "web/WebViewImpl.h"
 #include "wtf/PassOwnPtr.h"
+#include <gmock/gmock.h>
+#include <gtest/gtest.h>
 #include <string>
 
 namespace blink {
 
 class WebLocalFrameImpl;
 class WebSettings;
 
 namespace FrameTestHelpers {
 
 class TestWebFrameClient;
@@ skipping 74 matching lines @@
 class TestWebViewClient : public WebViewClient {
 public:
     virtual ~TestWebViewClient() { }
     virtual void initializeLayerTreeView() override;
     virtual WebLayerTreeView* layerTreeView() override { return m_layerTreeView.get(); }
 
 private:
     OwnPtr<WebLayerTreeView> m_layerTreeView;
 };
 
+class UseMockScrollbarSettings {
+public:
+    UseMockScrollbarSettings()
+    {
+        Settings::setMockScrollbarsEnabled(true);
+        RuntimeEnabledFeatures::setOverlayScrollbarsEnabled(true);
+        EXPECT_TRUE(ScrollbarTheme::theme()->usesOverlayScrollbars());
+    }
+
+    ~UseMockScrollbarSettings()
+    {
+        Settings::setMockScrollbarsEnabled(false);
+        RuntimeEnabledFeatures::setOverlayScrollbarsEnabled(false);
+    }
+};
+
 } // namespace FrameTestHelpers
 } // namespace blink
 
 #endif // FrameTestHelpers_h