Fix tests to ship Aura overlay scrollbars for ChromeOS

third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp

Index: third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp b/third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp
index eb46576a320bcd92d1264793ae31d7a64d6e3d2f..0c9bda27d5925e8dc59c98ae90e84ddfa6b5d479 100644
--- a/third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/BaseAudioContextTest.cpp
@@ -80,6 +80,8 @@ class BaseAudioContextTest : public ::testing::Test {
   using AutoplayStatus = BaseAudioContext::AutoplayStatus;
 
   void SetUp() override {
+    m_oldMockScrollbarSetting = Settings::mockScrollbarsEnabled();
+    Settings::setMockScrollbarsEnabled(true);
     m_dummyPageHolder = DummyPageHolder::create();
     m_dummyFrameOwner = DummyFrameOwner::create();
     document().updateSecurityOrigin(
@@ -87,6 +89,7 @@ class BaseAudioContextTest : public ::testing::Test {
   }
 
   void TearDown() override {
+    Settings::setMockScrollbarsEnabled(m_oldMockScrollbarSetting);
     if (m_childFrame) {
       m_childDocumentLoader->detachFromFrame();
       m_childDocumentLoader.clear();
@@ -132,6 +135,7 @@ class BaseAudioContextTest : public ::testing::Test {
   Persistent<LocalFrame> m_childFrame;
   Persistent<DocumentLoader> m_childDocumentLoader;
 
+  bool m_oldMockScrollbarSetting;
   BaseAudioContextTestPlatform m_testPlatform;
 };