Preparation for enabling slimming paint synchronized painting

third_party/WebKit/Source/web/tests/WebFrameTest.cpp

 /*
  * Copyright (C) 2010 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 113 matching lines @@
 #include "web/tests/FrameTestHelpers.h"
 #include "wtf/Forward.h"
 #include "wtf/dtoa/utils.h"
 #include <gmock/gmock.h>
 #include <gtest/gtest.h>
 #include <map>
 #include <stdarg.h>
 #include <v8.h>
 
 using blink::URLTestHelpers::toKURL;
-using blink::FrameTestHelpers::UseMockScrollbarSettings;
 using blink::testing::runPendingTasks;
 using testing::ElementsAre;
 using testing::Mock;
 using testing::_;
 
 namespace blink {
 
 ::std::ostream& operator<<(::std::ostream& os, const WebFloatSize& size)
 {
     return os << "WebFloatSize: ["
@@ skipping 121 matching lines @@
     void removeElementById(WebLocalFrameImpl* frame, const AtomicString& id)
     {
         Element* element = frame->frame()->document()->getElementById(id);
         ASSERT(element);
         element->remove();
     }
 
     std::string m_baseURL;
     std::string m_notBaseURL;
     std::string m_chromeURL;
+    FrameTestHelpers::UseMockScrollbarSettings m_mockScrollbarSettings;
 };
 
 enum ParameterizedWebFrameTestConfig {
     Default,
     RootLayerScrolls
 };
 
 class ParameterizedWebFrameTest
     : public WebFrameTest
     , public ::testing::WithParamInterface<ParameterizedWebFrameTestConfig>
@@ skipping 618 matching lines @@
             multiplierChecked = true;
         }
     }
     return multiplierChecked;
 }
 
 } // anonymous namespace
 
 TEST_P(ParameterizedWebFrameTest, ChangeInFixedLayoutResetsTextAutosizingMultipliers)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("fixed_layout.html");
 
     FixedLayoutTestWebViewClient client;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "fixed_layout.html", true, 0, &client, enableViewportSettings);
 
     Document* document = toLocalFrame(webViewHelper.webViewImpl()->page()->mainFrame())->document();
     document->settings()->setTextAutosizingEnabled(true);
     EXPECT_TRUE(document->settings()->textAutosizingEnabled());
     webViewHelper.webViewImpl()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webViewImpl()->layout();
 
     EXPECT_TRUE(setTextAutosizingMultiplier(document, 2));
 
     ViewportDescription description = document->viewportDescription();
     // Choose a width that's not going match the viewport width of the loaded document.
     description.minWidth = Length(100, blink::Fixed);
     description.maxWidth = Length(100, blink::Fixed);
     webViewHelper.webViewImpl()->updatePageDefinedViewportConstraints(description);
 
     EXPECT_TRUE(checkTextAutosizingMultiplier(document, 1));
 }
 
 TEST_P(ParameterizedWebFrameTest, WorkingTextAutosizingMultipliers_VirtualViewport)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     const std::string htmlFile = "fixed_layout.html";
     registerMockedHttpURLLoad(htmlFile);
 
     FixedLayoutTestWebViewClient client;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + htmlFile, true, 0, &client, configureAndroid);
 
     Document* document = toLocalFrame(webViewHelper.webViewImpl()->page()->mainFrame())->document();
     document->settings()->setTextAutosizingEnabled(true);
     EXPECT_TRUE(document->settings()->textAutosizingEnabled());
 
     webViewHelper.webView()->resize(WebSize(490, 800));
 
     // Multiplier: 980 / 490 = 2.0
     EXPECT_TRUE(checkTextAutosizingMultiplier(document, 2.0));
 }
 
 TEST_P(ParameterizedWebFrameTest, VisualViewportSetSizeInvalidatesTextAutosizingMultipliers)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("iframe_reload.html");
     registerMockedHttpURLLoad("visible_iframe.html");
 
     FixedLayoutTestWebViewClient client;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "iframe_reload.html", true, 0, &client, enableViewportSettings);
 
@@ skipping 22 matching lines @@
             continue;
         for (LayoutObject* layoutObject = toLocalFrame(frame)->document()->layoutView(); layoutObject; layoutObject = layoutObject->nextInPreOrder()) {
             if (layoutObject->isText())
                 EXPECT_TRUE(layoutObject->needsLayout());
         }
     }
 }
 
 TEST_P(ParameterizedWebFrameTest, ZeroHeightPositiveWidthNotIgnored)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
-
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 1280;
     int viewportHeight = 0;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initialize(true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_EQ(viewportWidth, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width());
     EXPECT_EQ(viewportHeight, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height());
 }
 
 TEST_P(ParameterizedWebFrameTest, DeviceScaleFactorUsesDefaultWithoutViewportTag)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("no_viewport_tag.html");
 
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 2;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "no_viewport_tag.html", true, 0, &client, enableViewportSettings);
 
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     EXPECT_EQ(2, webViewHelper.webView()->deviceScaleFactor());
 
     // Device scale factor should be independent of page scale.
     webViewHelper.webView()->setDefaultPageScaleLimits(1, 2);
     webViewHelper.webView()->setPageScaleFactor(0.5);
     webViewHelper.webView()->layout();
     EXPECT_EQ(1, webViewHelper.webView()->pageScaleFactor());
 
     // Force the layout to happen before leaving the test.
     webViewHelper.webView()->mainFrame()->contentAsText(1024).utf8();
 }
 
 TEST_P(ParameterizedWebFrameTest, FixedLayoutInitializeAtMinimumScale)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
-
     registerMockedHttpURLLoad("fixed_layout.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     // Make sure we initialize to minimum scale, even if the window size
     // only becomes available after the load begins.
     FrameTestHelpers::WebViewHelper webViewHelper(this);
@@ skipping 17 matching lines @@
     webViewHelper.webViewImpl()->didChangeContentsSize();
     EXPECT_EQ(userPinchPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
 
     // Make sure we don't reset to initial scale if the viewport size changes.
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight + 100));
     EXPECT_EQ(userPinchPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, WideDocumentInitializeAtMinimumScale)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
-
     registerMockedHttpURLLoad("wide_document.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     // Make sure we initialize to minimum scale, even if the window size
     // only becomes available after the load begins.
     FrameTestHelpers::WebViewHelper webViewHelper(this);
@@ skipping 17 matching lines @@
     webViewHelper.webViewImpl()->didChangeContentsSize();
     EXPECT_EQ(userPinchPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
 
     // Make sure we don't reset to initial scale if the viewport size changes.
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight + 100));
     EXPECT_EQ(userPinchPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, DelayedViewportInitialScale)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-auto-initial-scale.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-auto-initial-scale.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_EQ(0.25f, webViewHelper.webView()->pageScaleFactor());
 
     Document* document = toLocalFrame(webViewHelper.webViewImpl()->page()->mainFrame())->document();
     ViewportDescription description = document->viewportDescription();
     description.zoom = 2;
     document->setViewportDescription(description);
     webViewHelper.webView()->layout();
     EXPECT_EQ(2, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, setLoadWithOverviewModeToFalse)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-auto-initial-scale.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-auto-initial-scale.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setLoadWithOverviewMode(false);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     // The page must be displayed at 100% zoom.
     EXPECT_EQ(1.0f, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, SetLoadWithOverviewModeToFalseAndNoWideViewport)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("large-div.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "large-div.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setLoadWithOverviewMode(false);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(false);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     // The page must be displayed at 100% zoom, despite that it hosts a wide div element.
     EXPECT_EQ(1.0f, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, NoWideViewportIgnoresPageViewportWidth)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-auto-initial-scale.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-auto-initial-scale.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(false);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     // The page sets viewport width to 3000, but with UseWideViewport == false is must be ignored.
     EXPECT_EQ(viewportWidth, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().width());
     EXPECT_EQ(viewportHeight, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().height());
 }
 
 TEST_P(ParameterizedWebFrameTest, NoWideViewportIgnoresPageViewportWidthButAccountsScale)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-wide-2x-initial-scale.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-wide-2x-initial-scale.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(false);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     // The page sets viewport width to 3000, but with UseWideViewport == false it must be ignored.
     // While the initial scale specified by the page must be accounted.
     EXPECT_EQ(viewportWidth / 2, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().width());
     EXPECT_EQ(viewportHeight / 2, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().height());
 }
 
 TEST_P(ParameterizedWebFrameTest, WideViewportSetsTo980WithoutViewportTag)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("no_viewport_tag.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "no_viewport_tag.html", true, 0, &client, enableViewportSettings);
     applyViewportStyleOverride(&webViewHelper);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(true);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_EQ(980, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().width());
     EXPECT_EQ(980.0 / viewportWidth * viewportHeight, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().height());
 }
 
 TEST_P(ParameterizedWebFrameTest, WideViewportSetsTo980WithXhtmlMp)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport/viewport-legacy-xhtmlmp.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initialize(true, 0, &client, enableViewportSettings);
     applyViewportStyleOverride(&webViewHelper);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(true);
     FrameTestHelpers::loadFrame(webViewHelper.webView()->mainFrame(), m_baseURL + "viewport/viewport-legacy-xhtmlmp.html");
 
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     EXPECT_EQ(viewportWidth, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().width());
     EXPECT_EQ(viewportHeight, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().height());
 }
 
 TEST_P(ParameterizedWebFrameTest, NoWideViewportAndHeightInMeta)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-height-1000.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-height-1000.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(false);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_EQ(viewportWidth, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().width());
 }
 
 TEST_P(ParameterizedWebFrameTest, WideViewportSetsTo980WithAutoWidth)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-2x-initial-scale.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-2x-initial-scale.html", true, 0, &client, enableViewportSettings);
     applyViewportStyleOverride(&webViewHelper);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(true);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_EQ(980, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().width());
     EXPECT_EQ(980.0 / viewportWidth * viewportHeight, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().height());
 }
 
 TEST_P(ParameterizedWebFrameTest, PageViewportInitialScaleOverridesLoadWithOverviewMode)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-wide-2x-initial-scale.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-wide-2x-initial-scale.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setLoadWithOverviewMode(false);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     // The page must be displayed at 200% zoom, as specified in its viewport meta tag.
     EXPECT_EQ(2.0f, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, setInitialPageScaleFactorPermanently)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
-
     registerMockedHttpURLLoad("fixed_layout.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     float enforcedPageScaleFactor = 2.0f;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "fixed_layout.html", true, 0, &client, enableViewportSettings);
     applyViewportStyleOverride(&webViewHelper);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
@@ skipping 10 matching lines @@
 
     EXPECT_EQ(enforcedPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
 
     webViewHelper.webView()->setInitialPageScaleOverride(-1);
     webViewHelper.webView()->layout();
     EXPECT_EQ(1.0, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, PermanentInitialPageScaleFactorOverridesLoadWithOverviewMode)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-auto-initial-scale.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
     float enforcedPageScaleFactor = 0.5f;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-auto-initial-scale.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setLoadWithOverviewMode(false);
     webViewHelper.webView()->setInitialPageScaleOverride(enforcedPageScaleFactor);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_EQ(enforcedPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, PermanentInitialPageScaleFactorOverridesPageViewportInitialScale)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-wide-2x-initial-scale.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
     float enforcedPageScaleFactor = 0.5f;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-wide-2x-initial-scale.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->setInitialPageScaleOverride(enforcedPageScaleFactor);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_EQ(enforcedPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, SmallPermanentInitialPageScaleFactorIsClobbered)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     const char* pages[] = {
         // These pages trigger the clobbering condition. There must be a matching item in "pageScaleFactors" array.
         "viewport-device-0.5x-initial-scale.html",
         "viewport-initial-scale-1.html",
         // These ones do not.
         "viewport-auto-initial-scale.html",
         "viewport-target-densitydpi-device-and-fixed-width.html"
     };
     float pageScaleFactors[] = { 0.5f, 1.0f };
     for (size_t i = 0; i < ARRAY_SIZE(pages); ++i)
@@ skipping 15 matching lines @@
             webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
             float expectedPageScaleFactor = quirkEnabled && i < ARRAY_SIZE(pageScaleFactors) ? pageScaleFactors[i] : enforcedPageScaleFactor;
             EXPECT_EQ(expectedPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
         }
     }
 }
 
 TEST_P(ParameterizedWebFrameTest, PermanentInitialPageScaleFactorAffectsLayoutWidth)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
-
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
     float enforcedPageScaleFactor = 0.5;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad("about:blank", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(false);
     webViewHelper.webView()->settings()->setLoadWithOverviewMode(false);
     webViewHelper.webView()->setInitialPageScaleOverride(enforcedPageScaleFactor);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_EQ(viewportWidth / enforcedPageScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().width());
     EXPECT_EQ(enforcedPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, DocumentElementClientHeightWorksWithWrapContentMode)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("0-by-0.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
 
     webViewHelper.initializeAndLoad(m_baseURL + "0-by-0.html", true, 0, &client, configureAndroid);
     webViewHelper.webView()->settings()->setForceZeroLayoutHeight(true);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     LocalFrame* frame = webViewHelper.webViewImpl()->mainFrameImpl()->frame();
     Document* document = frame->document();
     EXPECT_EQ(viewportHeight, document->documentElement()->clientHeight());
     EXPECT_EQ(viewportWidth, document->documentElement()->clientWidth());
 }
 
 TEST_P(ParameterizedWebFrameTest, SetForceZeroLayoutHeightWorksWithWrapContentMode)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("0-by-0.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
 
     webViewHelper.initializeAndLoad(m_baseURL + "0-by-0.html", true, 0, &client, configureAndroid);
@@ skipping 22 matching lines @@
 
     LocalFrame* frame = webViewHelper.webViewImpl()->mainFrameImpl()->frame();
     VisualViewport& visualViewport = frame->page()->frameHost().visualViewport();
     EXPECT_EQ(viewportHeight, visualViewport.containerLayer()->size().height());
     EXPECT_TRUE(visualViewport.containerLayer()->platformLayer()->masksToBounds());
     EXPECT_FALSE(compositor->containerLayer()->platformLayer()->masksToBounds());
 }
 
 TEST_P(ParameterizedWebFrameTest, SetForceZeroLayoutHeight)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("200-by-300.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
 
     webViewHelper.initializeAndLoad(m_baseURL + "200-by-300.html", true, 0, &client, enableViewportSettings);
@@ skipping 19 matching lines @@
 }
 
 TEST_F(WebFrameTest, SetForceZeroLayoutHeightWorksWithRelayoutsWhenHeightChanged)
 {
     // this unit test is an attempt to target a real world case where an app could
     // 1. call resize(width, 0) and setForceZeroLayoutHeight(true)
     // 2. load content (hoping that the viewport height would increase
     // as more content is added)
     // 3. fail to register touch events aimed at the loaded content
     // because the layout is only updated if either width or height is changed
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("button.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper;
 
     webViewHelper.initializeAndLoad(m_baseURL + "button.html", true, 0, &client, configureAndroid);
@@ skipping 16 matching lines @@
     EXPECT_EQ(String("oldValue"), element->innerText());
 
     PlatformGestureEvent gestureEvent(PlatformEvent::Type::GestureTap, hitPoint, hitPoint, IntSize(0, 0), 0, PlatformEvent::NoModifiers, PlatformGestureSourceTouchscreen);
     webViewHelper.webViewImpl()->mainFrameImpl()->frame()->eventHandler().handleGestureEvent(gestureEvent);
     // when pressed, the button changes its own text to "updatedValue"
     EXPECT_EQ(String("updatedValue"), element->innerText());
 }
 
 TEST_P(ParameterizedWebFrameTest, SetForceZeroLayoutHeightWorksAcrossNavigations)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("200-by-300.html");
     registerMockedHttpURLLoad("large-div.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
 
     webViewHelper.initializeAndLoad(m_baseURL + "200-by-300.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setForceZeroLayoutHeight(true);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     FrameTestHelpers::loadFrame(webViewHelper.webView()->mainFrame(), m_baseURL + "large-div.html");
     webViewHelper.webView()->layout();
 
     EXPECT_EQ(0, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height());
 }
 
 TEST_P(ParameterizedWebFrameTest, SetForceZeroLayoutHeightWithWideViewportQuirk)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("200-by-300.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
 
     webViewHelper.initializeAndLoad(m_baseURL + "200-by-300.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(true);
     webViewHelper.webView()->settings()->setForceZeroLayoutHeight(true);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     EXPECT_EQ(0, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height());
 }
 
 TEST_P(ParameterizedWebFrameTest, WideViewportAndWideContentWithInitialScale)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("wide_document_width_viewport.html");
     registerMockedHttpURLLoad("white-1x1.png");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 600;
     int viewportHeight = 800;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad("about:blank", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(true);
     webViewHelper.webView()->settings()->setViewportMetaLayoutSizeQuirk(true);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     FrameTestHelpers::loadFrame(webViewHelper.webView()->mainFrame(), m_baseURL + "wide_document_width_viewport.html");
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     int wideDocumentWidth = 800;
     float minimumPageScaleFactor = viewportWidth / (float) wideDocumentWidth;
     EXPECT_EQ(minimumPageScaleFactor, webViewHelper.webViewImpl()->pageScaleFactor());
     EXPECT_EQ(minimumPageScaleFactor, webViewHelper.webViewImpl()->minimumPageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, WideViewportQuirkClobbersHeight)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-height-1000.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 600;
     int viewportHeight = 800;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad("about:blank", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(false);
     webViewHelper.webView()->settings()->setViewportMetaLayoutSizeQuirk(true);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     FrameTestHelpers::loadFrame(webViewHelper.webView()->mainFrame(), m_baseURL + "viewport-height-1000.html");
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_EQ(800, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height());
     EXPECT_EQ(1, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, LayoutSize320Quirk)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport/viewport-30.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 600;
     int viewportHeight = 800;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad("about:blank", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
@@ skipping 31 matching lines @@
     EXPECT_EQ(1000, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height());
 
     description.maxHeight = Length(320, blink::Fixed);
     document->setViewportDescription(description);
     webViewHelper.webView()->layout();
     EXPECT_EQ(800, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height());
 }
 
 TEST_P(ParameterizedWebFrameTest, ZeroValuesQuirk)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-zero-values.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initialize(true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setViewportMetaZeroValuesQuirk(true);
@@ skipping 67 matching lines @@
     webViewHelper.webView()->settings()->setIgnoreMainFrameOverflowHiddenQuirk(true);
     FrameTestHelpers::loadFrame(webViewHelper.webView()->mainFrame(), m_baseURL + "body-overflow-hidden.html");
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     FrameView* view = webViewHelper.webViewImpl()->mainFrameImpl()->frameView();
     EXPECT_TRUE(view->userInputScrollable(VerticalScrollbar));
 }
 
 TEST_P(ParameterizedWebFrameTest, NonZeroValuesNoQuirk)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-nonzero-values.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
     float expectedPageScaleFactor = 0.5f;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initialize(true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setViewportMetaZeroValuesQuirk(true);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     FrameTestHelpers::loadFrame(webViewHelper.webView()->mainFrame(), m_baseURL + "viewport-nonzero-values.html");
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_EQ(viewportWidth / expectedPageScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width());
     EXPECT_EQ(expectedPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
 
     webViewHelper.webView()->settings()->setUseWideViewport(true);
     webViewHelper.webView()->layout();
     EXPECT_EQ(viewportWidth / expectedPageScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width());
     EXPECT_EQ(expectedPageScaleFactor, webViewHelper.webView()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, setPageScaleFactorDoesNotLayout)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("fixed_layout.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     // Small viewport to ensure there are always scrollbars.
     int viewportWidth = 64;
     int viewportHeight = 48;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "fixed_layout.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     int prevLayoutCount = webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutCount();
     webViewHelper.webViewImpl()->setPageScaleFactor(3);
     EXPECT_FALSE(webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->needsLayout());
     EXPECT_EQ(prevLayoutCount, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutCount());
 }
 
 TEST_P(ParameterizedWebFrameTest, setPageScaleFactorWithOverlayScrollbarsDoesNotLayout)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
-
     registerMockedHttpURLLoad("fixed_layout.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "fixed_layout.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     int prevLayoutCount = webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutCount();
     webViewHelper.webViewImpl()->setPageScaleFactor(30);
     EXPECT_FALSE(webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->needsLayout());
     EXPECT_EQ(prevLayoutCount, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutCount());
 
 }
 
 TEST_P(ParameterizedWebFrameTest, pageScaleFactorWrittenToHistoryItem)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("fixed_layout.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "fixed_layout.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     webViewHelper.webView()->setPageScaleFactor(3);
     EXPECT_EQ(3, toLocalFrame(webViewHelper.webViewImpl()->page()->mainFrame())->loader().currentItem()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, initialScaleWrittenToHistoryItem)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("fixed_layout.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initialize(true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->setDefaultPageScaleLimits(0.25f, 5);
     FrameTestHelpers::loadFrame(webViewHelper.webView()->mainFrame(), m_baseURL + "fixed_layout.html");
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     int defaultFixedLayoutWidth = 980;
     float minimumPageScaleFactor = viewportWidth / (float) defaultFixedLayoutWidth;
     EXPECT_EQ(minimumPageScaleFactor, toLocalFrame(webViewHelper.webViewImpl()->page()->mainFrame())->loader().currentItem()->pageScaleFactor());
 }
 
 TEST_P(ParameterizedWebFrameTest, pageScaleFactorDoesntShrinkFrameView)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("large-div.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     // Small viewport to ensure there are always scrollbars.
     int viewportWidth = 64;
     int viewportHeight = 48;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "large-div.html", true, 0, &client, enableViewportSettings);
@@ skipping 20 matching lines @@
     EXPECT_EQ(viewportWidthMinusScrollbar, unscaledSizeMinusScrollbar.width());
     EXPECT_EQ(viewportHeightMinusScrollbar, unscaledSizeMinusScrollbar.height());
 
     IntSize frameViewSize = view->visibleContentRect().size();
     EXPECT_EQ(viewportWidthMinusScrollbar, frameViewSize.width());
     EXPECT_EQ(viewportHeightMinusScrollbar, frameViewSize.height());
 }
 
 TEST_P(ParameterizedWebFrameTest, pageScaleFactorDoesNotApplyCssTransform)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("fixed_layout.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "fixed_layout.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     webViewHelper.webView()->setPageScaleFactor(2);
 
     EXPECT_EQ(980, toLocalFrame(webViewHelper.webViewImpl()->page()->mainFrame())->contentLayoutObject()->unscaledDocumentRect().width());
     EXPECT_EQ(980, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->contentsSize().width());
 }
 
 TEST_P(ParameterizedWebFrameTest, targetDensityDpiHigh)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-target-densitydpi-high.html");
 
     FixedLayoutTestWebViewClient client;
     // high-dpi = 240
     float targetDpi = 240.0f;
     float deviceScaleFactors[] = { 1.0f, 4.0f / 3.0f, 2.0f };
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     for (size_t i = 0; i < ARRAY_SIZE(deviceScaleFactors); ++i) {
@@ skipping 11 matching lines @@
         // physical pixels.
         float densityDpiScaleRatio = deviceScaleFactor * targetDpi / deviceDpi;
         EXPECT_NEAR(viewportWidth * densityDpiScaleRatio, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width(), 1.0f);
         EXPECT_NEAR(viewportHeight * densityDpiScaleRatio, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height(), 1.0f);
         EXPECT_NEAR(1.0f / densityDpiScaleRatio, webViewHelper.webView()->pageScaleFactor(), 0.01f);
     }
 }
 
 TEST_P(ParameterizedWebFrameTest, targetDensityDpiDevice)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-target-densitydpi-device.html");
 
     float deviceScaleFactors[] = { 1.0f, 4.0f / 3.0f, 2.0f };
 
     FixedLayoutTestWebViewClient client;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     for (size_t i = 0; i < ARRAY_SIZE(deviceScaleFactors); ++i) {
         client.m_screenInfo.deviceScaleFactor = deviceScaleFactors[i];
 
         FrameTestHelpers::WebViewHelper webViewHelper(this);
         webViewHelper.initializeAndLoad(m_baseURL + "viewport-target-densitydpi-device.html", true, 0, &client, enableViewportSettings);
         webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
         webViewHelper.webView()->settings()->setSupportDeprecatedTargetDensityDPI(true);
         webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
         EXPECT_NEAR(viewportWidth * client.m_screenInfo.deviceScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width(), 1.0f);
         EXPECT_NEAR(viewportHeight * client.m_screenInfo.deviceScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height(), 1.0f);
         EXPECT_NEAR(1.0f / client.m_screenInfo.deviceScaleFactor, webViewHelper.webView()->pageScaleFactor(), 0.01f);
     }
 }
 
 TEST_P(ParameterizedWebFrameTest, targetDensityDpiDeviceAndFixedWidth)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-target-densitydpi-device-and-fixed-width.html");
 
     float deviceScaleFactors[] = { 1.0f, 4.0f / 3.0f, 2.0f };
 
     FixedLayoutTestWebViewClient client;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     for (size_t i = 0; i < ARRAY_SIZE(deviceScaleFactors); ++i) {
         client.m_screenInfo.deviceScaleFactor = deviceScaleFactors[i];
 
         FrameTestHelpers::WebViewHelper webViewHelper(this);
         webViewHelper.initializeAndLoad(m_baseURL + "viewport-target-densitydpi-device-and-fixed-width.html", true, 0, &client, enableViewportSettings);
         webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
         webViewHelper.webView()->settings()->setSupportDeprecatedTargetDensityDPI(true);
         webViewHelper.webView()->settings()->setUseWideViewport(true);
         webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
         EXPECT_NEAR(viewportWidth, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width(), 1.0f);
         EXPECT_NEAR(viewportHeight, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height(), 1.0f);
         EXPECT_NEAR(1.0f, webViewHelper.webView()->pageScaleFactor(), 0.01f);
     }
 }
 
 TEST_P(ParameterizedWebFrameTest, NoWideViewportAndScaleLessThanOne)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-initial-scale-less-than-1.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1.33f;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-initial-scale-less-than-1.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setSupportDeprecatedTargetDensityDPI(true);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(false);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     EXPECT_NEAR(viewportWidth * client.m_screenInfo.deviceScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width(), 1.0f);
     EXPECT_NEAR(viewportHeight * client.m_screenInfo.deviceScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height(), 1.0f);
     EXPECT_NEAR(1.0f / client.m_screenInfo.deviceScaleFactor, webViewHelper.webView()->pageScaleFactor(), 0.01f);
 }
 
 TEST_P(ParameterizedWebFrameTest, NoWideViewportAndScaleLessThanOneWithDeviceWidth)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-initial-scale-less-than-1-device-width.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1.33f;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-initial-scale-less-than-1-device-width.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setSupportDeprecatedTargetDensityDPI(true);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(false);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     const float pageZoom = 0.25f;
     EXPECT_NEAR(viewportWidth * client.m_screenInfo.deviceScaleFactor / pageZoom, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width(), 1.0f);
     EXPECT_NEAR(viewportHeight * client.m_screenInfo.deviceScaleFactor / pageZoom, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height(), 1.0f);
     EXPECT_NEAR(1.0f / client.m_screenInfo.deviceScaleFactor, webViewHelper.webView()->pageScaleFactor(), 0.01f);
 }
 
 TEST_P(ParameterizedWebFrameTest, NoWideViewportAndNoViewportWithInitialPageScaleOverride)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("large-div.html");
 
     FixedLayoutTestWebViewClient client;
     int viewportWidth = 640;
     int viewportHeight = 480;
     float enforcedPageScaleFactor = 5.0f;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "large-div.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->setDefaultPageScaleLimits(0.25f, 5);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(false);
     webViewHelper.webView()->setInitialPageScaleOverride(enforcedPageScaleFactor);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     EXPECT_NEAR(viewportWidth / enforcedPageScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width(), 1.0f);
     EXPECT_NEAR(viewportHeight / enforcedPageScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height(), 1.0f);
     EXPECT_NEAR(enforcedPageScaleFactor, webViewHelper.webView()->pageScaleFactor(), 0.01f);
 }
 
 TEST_P(ParameterizedWebFrameTest, NoUserScalableQuirkIgnoresViewportScale)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-initial-scale-and-user-scalable-no.html");
 
     FixedLayoutTestWebViewClient client;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-initial-scale-and-user-scalable-no.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setViewportMetaNonUserScalableQuirk(true);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     EXPECT_NEAR(viewportWidth, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width(), 1.0f);
     EXPECT_NEAR(viewportHeight, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height(), 1.0f);
     EXPECT_NEAR(1.0f, webViewHelper.webView()->pageScaleFactor(), 0.01f);
 }
 
 TEST_P(ParameterizedWebFrameTest, NoUserScalableQuirkIgnoresViewportScaleForNonWideViewport)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-initial-scale-and-user-scalable-no.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1.33f;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-initial-scale-and-user-scalable-no.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setSupportDeprecatedTargetDensityDPI(true);
     webViewHelper.webView()->settings()->setViewportMetaNonUserScalableQuirk(true);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(false);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     EXPECT_NEAR(viewportWidth * client.m_screenInfo.deviceScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width(), 1.0f);
     EXPECT_NEAR(viewportHeight * client.m_screenInfo.deviceScaleFactor, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height(), 1.0f);
     EXPECT_NEAR(1.0f / client.m_screenInfo.deviceScaleFactor, webViewHelper.webView()->pageScaleFactor(), 0.01f);
 }
 
 TEST_P(ParameterizedWebFrameTest, NoUserScalableQuirkIgnoresViewportScaleForWideViewport)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("viewport-2x-initial-scale-non-user-scalable.html");
 
     FixedLayoutTestWebViewClient client;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "viewport-2x-initial-scale-non-user-scalable.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->settings()->setViewportMetaNonUserScalableQuirk(true);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
     webViewHelper.webView()->settings()->setUseWideViewport(true);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
 
     EXPECT_NEAR(viewportWidth, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().width(), 1.0f);
     EXPECT_NEAR(viewportHeight, webViewHelper.webViewImpl()->mainFrameImpl()->frameView()->layoutSize().height(), 1.0f);
     EXPECT_NEAR(1.0f, webViewHelper.webView()->pageScaleFactor(), 0.01f);
 }
 
 TEST_P(ParameterizedWebFrameTest, DesktopPageCanBeZoomedInWhenWideViewportIsTurnedOff)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("no_viewport_tag.html");
 
     FixedLayoutTestWebViewClient client;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "no_viewport_tag.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->setDefaultPageScaleLimits(0.25f, 5);
     webViewHelper.webView()->settings()->setWideViewportQuirkEnabled(true);
@@ skipping 13 matching lines @@
         FloatSize relativeOffset = FloatPoint(absoluteOffset) - FloatPoint(rect.location());
         relativeOffset.scale(1.f / rect.width(), 1.f / rect.height());
         return relativeOffset;
     }
 
     void testResizeYieldsCorrectScrollAndScale(const char* url,
                                                const float initialPageScaleFactor,
                                                const WebSize scrollOffset,
                                                const WebSize viewportSize,
                                                const bool shouldScaleRelativeToViewportWidth) {
-        UseMockScrollbarSettings mockScrollbarSettings;
         registerMockedHttpURLLoad(url);
 
         const float aspectRatio = static_cast<float>(viewportSize.width) / viewportSize.height;
 
         FrameTestHelpers::WebViewHelper webViewHelper(this);
         webViewHelper.initializeAndLoad(m_baseURL + url, true, 0, 0, enableViewportSettings);
         webViewHelper.webViewImpl()->setDefaultPageScaleLimits(0.25f, 5);
 
         // Origin scrollOffsets preserved under resize.
         {
@@ skipping 79 matching lines @@
     const WebSize scrollOffset(200, 400);
     const WebSize viewportSize(320, 240);
     const bool shouldScaleRelativeToViewportWidth = true;
 
     testResizeYieldsCorrectScrollAndScale(
         url, initialPageScaleFactor, scrollOffset, viewportSize, shouldScaleRelativeToViewportWidth);
 }
 
 TEST_P(ParameterizedWebFrameTest, pageScaleFactorUpdatesScrollbars)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("fixed_layout.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "fixed_layout.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->resize(WebSize(viewportWidth, viewportHeight));
     webViewHelper.webView()->layout();
 
     FrameView* view = webViewHelper.webViewImpl()->mainFrameImpl()->frameView();
     EXPECT_EQ(view->scrollSize(HorizontalScrollbar), view->contentsSize().width() - view->visibleContentRect().width());
     EXPECT_EQ(view->scrollSize(VerticalScrollbar), view->contentsSize().height() - view->visibleContentRect().height());
 
     webViewHelper.webView()->setPageScaleFactor(10);
 
     EXPECT_EQ(view->scrollSize(HorizontalScrollbar), view->contentsSize().width() - view->visibleContentRect().width());
     EXPECT_EQ(view->scrollSize(VerticalScrollbar), view->contentsSize().height() - view->visibleContentRect().height());
 }
 
 TEST_P(ParameterizedWebFrameTest, CanOverrideScaleLimits)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
-
     registerMockedHttpURLLoad("no_scale_for_you.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "no_scale_for_you.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->setDefaultPageScaleLimits(0.25f, 5);
@@ skipping 15 matching lines @@
     EXPECT_EQ(2.0f, webViewHelper.webViewImpl()->maximumPageScaleFactor());
 }
 
 // Android doesn't have scrollbars on the main FrameView
 #if OS(ANDROID)
 TEST_F(WebFrameTest, DISABLED_updateOverlayScrollbarLayers)
 #else
 TEST_F(WebFrameTest, updateOverlayScrollbarLayers)
 #endif
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
-
     registerMockedHttpURLLoad("large-div.html");
 
     int viewWidth = 500;
     int viewHeight = 500;
 
     OwnPtr<FakeCompositingWebViewClient> fakeCompositingWebViewClient = adoptPtr(new FakeCompositingWebViewClient());
     FrameTestHelpers::WebViewHelper webViewHelper;
     webViewHelper.initialize(true, 0, fakeCompositingWebViewClient.get(), &configueCompositingWebView);
 
     webViewHelper.webView()->resize(WebSize(viewWidth, viewHeight));
@@ skipping 2392 matching lines @@
     webViewHelper.webView()->resize(WebSize(1000, 1000));
     webViewHelper.webView()->layout();
 
     client.resetTriggered();
     webViewHelper.webView()->handleInputEvent(fatTap(50, 50));
     EXPECT_FALSE(client.triggered());
 }
 
 TEST_P(ParameterizedWebFrameTest, DisambiguationPopupMobileSite)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     const std::string htmlFile = "disambiguation_popup_mobile_site.html";
     registerMockedHttpURLLoad(htmlFile);
 
     DisambiguationPopupTestWebViewClient client;
 
     // Make sure we initialize to minimum scale, even if the window size
     // only becomes available after the load begins.
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + htmlFile, true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->resize(WebSize(1000, 1000));
@@ skipping 15 matching lines @@
 
     for (int i = 0; i <= 46; i++) {
         client.resetTriggered();
         webViewHelper.webView()->handleInputEvent(fatTap(10 + i * 5, 590));
         EXPECT_FALSE(client.triggered());
     }
 }
 
 TEST_P(ParameterizedWebFrameTest, DisambiguationPopupViewportSite)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     const std::string htmlFile = "disambiguation_popup_viewport_site.html";
     registerMockedHttpURLLoad(htmlFile);
 
     DisambiguationPopupTestWebViewClient client;
 
     // Make sure we initialize to minimum scale, even if the window size
     // only becomes available after the load begins.
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + htmlFile, true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->resize(WebSize(1000, 1000));
@@ skipping 15 matching lines @@
 
     for (int i = 0; i <= 46; i++) {
         client.resetTriggered();
         webViewHelper.webView()->handleInputEvent(fatTap(10 + i * 5, 590));
         EXPECT_FALSE(client.triggered());
     }
 }
 
 TEST_F(WebFrameTest, DisambiguationPopupVisualViewport)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     const std::string htmlFile = "disambiguation_popup_200_by_800.html";
     registerMockedHttpURLLoad(htmlFile);
 
     DisambiguationPopupTestWebViewClient client;
 
     FrameTestHelpers::WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad(m_baseURL + htmlFile, true, 0, &client, configureAndroid);
 
     WebViewImpl* webViewImpl = webViewHelper.webViewImpl();
     ASSERT_TRUE(webViewImpl);
@@ skipping 1408 matching lines @@
     registerMockedHttpURLLoad("create_child_frame_fail.html");
     FailCreateChildFrame client;
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "create_child_frame_fail.html", true, &client);
 
     EXPECT_EQ(1, client.callCount());
 }
 
 TEST_P(ParameterizedWebFrameTest, fixedPositionInFixedViewport)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("fixed-position-in-fixed-viewport.html");
     FrameTestHelpers::WebViewHelper webViewHelper(this);
     webViewHelper.initializeAndLoad(m_baseURL + "fixed-position-in-fixed-viewport.html", true, 0, 0, enableViewportSettings);
 
     WebView* webView = webViewHelper.webView();
     webView->resize(WebSize(100, 100));
 
     Document* document = toWebLocalFrameImpl(webView->mainFrame())->frame()->document();
     Element* bottomFixed = document->getElementById("bottom-fixed");
     Element* topBottomFixed = document->getElementById("top-bottom-fixed");
@@ skipping 21 matching lines @@
     FrameView* frameView = webViewHelper.webViewImpl()->mainFrameImpl()->frameView();
     EXPECT_RECT_EQ(IntRect(0, 0, 200, 200), frameView->frameRect());
     frameView->setFrameRect(IntRect(100, 100, 200, 200));
     EXPECT_RECT_EQ(IntRect(100, 100, 200, 200), frameView->frameRect());
 }
 
 TEST_F(WebFrameTest, FrameViewScrollAccountsForTopControls)
 {
     FakeCompositingWebViewClient client;
     registerMockedHttpURLLoad("long_scroll.html");
-    UseMockScrollbarSettings mockScrollbarSettings;
     FrameTestHelpers::WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad(m_baseURL + "long_scroll.html", true, 0, &client, configureAndroid);
 
     WebViewImpl* webView = webViewHelper.webViewImpl();
     FrameView* frameView = webViewHelper.webViewImpl()->mainFrameImpl()->frameView();
 
     float topControlsHeight = 40;
     webView->setTopControlsHeight(topControlsHeight, false);
     webView->resize(WebSize(100, 100));
     webView->setPageScaleFactor(2.0f);
@@ skipping 42 matching lines @@
     // main frame.
     webView->applyViewportDeltas(WebFloatSize(), WebFloatSize(), WebFloatSize(), 1.0f, 1.0f / topControlsHeight);
     EXPECT_POINT_EQ(IntPoint(0, 1901), frameView->maximumScrollPosition());
 
     webView->applyViewportDeltas(WebFloatSize(), WebFloatSize(), WebFloatSize(), 1.0f, 2.0f / topControlsHeight);
     EXPECT_POINT_EQ(IntPoint(0, 1903), frameView->maximumScrollPosition());
 }
 
 TEST_F(WebFrameTest, MaximumScrollPositionCanBeNegative)
 {
-    UseMockScrollbarSettings mockScrollbarSettings;
     registerMockedHttpURLLoad("rtl-overview-mode.html");
 
     FixedLayoutTestWebViewClient client;
     client.m_screenInfo.deviceScaleFactor = 1;
     int viewportWidth = 640;
     int viewportHeight = 480;
 
     FrameTestHelpers::WebViewHelper webViewHelper;
     webViewHelper.initializeAndLoad(m_baseURL + "rtl-overview-mode.html", true, 0, &client, enableViewportSettings);
     webViewHelper.webView()->setInitialPageScaleOverride(-1);
@@ skipping 1804 matching lines @@
     EXPECT_TRUE(resource);
     EXPECT_NE(0, resource->loadFinishTime());
 
     DocumentLoader* loader = document->loader();
 
     EXPECT_TRUE(loader);
     EXPECT_EQ(loader->timing().responseEnd(), resource->loadFinishTime());
 }
 
 } // namespace blink