Enable smooth scrolling on mac

content/common/content_switches.cc

 // Copyright (c) 2011 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 "content/common/content_switches.h"
 
 namespace switches {
 
 // By default, file:// URIs cannot read other file:// URIs. This is an
 // override for developers who need the old behavior for testing.
@@ skipping 99 matching lines @@
 // Disable JavaScript I18N API.
 const char kDisableJavaScriptI18NAPI[]      = "disable-javascript-i18n-api";
 
 // Disable LocalStorage.
 const char kDisableLocalStorage[]           = "disable-local-storage";
 
 // Force logging to be disabled.  Logging is enabled by default in debug
 // builds.
 const char kDisableLogging[]                = "disable-logging";
 
+// Disable smooth scrolling for testing. Currently only needed on mac.
+const char kDisableMacSmoothScrollingForTesting[] =
+    "disable-mac-smooth-scrolling-for-testing";
+
 // Prevent plugins from running.
 const char kDisablePlugins[]                = "disable-plugins";
 
 // Disable pop-up blocking.
 const char kDisablePopupBlocking[]          = "disable-popup-blocking";
 
 // Turns off the accessibility in the renderer.
 const char kDisableRendererAccessibility[]  = "disable-renderer-accessibility";
 
 // Disable the seccomp sandbox (Linux only)
@@ skipping 343 matching lines @@
 // Specify the amount the trackpad should scroll by.
 const char kScrollPixels[]                  = "scroll-pixels";
 #endif
 
 #if !defined(OFFICIAL_BUILD)
 // Causes the renderer process to throw an assertion on launch.
 const char kRendererCheckFalseTest[]        = "renderer-check-false-test";
 #endif
 
 }  // namespace switches