Put Top Control resizing change behind a flag.

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

Index: third_party/WebKit/Source/web/tests/TopControlsTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/TopControlsTest.cpp b/third_party/WebKit/Source/web/tests/TopControlsTest.cpp
index 5ed7c95296884dff751058108392aaca81f6ffd0..c7b5ff4ed60b7644a4e46b7ac87e943b91966c67 100644
--- a/third_party/WebKit/Source/web/tests/TopControlsTest.cpp
+++ b/third_party/WebKit/Source/web/tests/TopControlsTest.cpp
@@ -72,6 +72,8 @@ public:
 
     WebViewImpl* initialize(const std::string& pageName = "large-div.html")
     {
+        RuntimeEnabledFeatures::setInertTopControlsEnabled(true);
+
         // Load a page with large body and set viewport size to 400x400 to ensure
         // main frame is scrollable.
         m_helper.initializeAndLoad(m_baseURL + pageName, true, 0, 0, &configureSettings);