Enable smooth scrolling on mac

chrome/test/ui/ppapi_uitest.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 "base/file_util.h"
 #include "base/path_service.h"
 #include "base/test/test_timeouts.h"
 #include "build/build_config.h"
+#include "content/common/content_switches.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/automation/tab_proxy.h"
 #include "chrome/test/ui/ui_test.h"
 #include "net/base/net_util.h"
 #include "net/test/test_server.h"
 #include "webkit/plugins/plugin_switches.h"
 
 namespace {
 
 // Platform-specific filename relative to the chrome executable.
@@ skipping 29 matching lines @@
     launch_arguments_.AppendSwitch(switches::kEnableFileCookies);
 
     // Some stuff is hung off of the testing interface which is not enabled
     // by default.
     launch_arguments_.AppendSwitch(switches::kEnablePepperTesting);
 
     // Give unlimited quota for files to Pepper tests.
     // TODO(dumi): remove this switch once we have a quota management
     // system in place.
     launch_arguments_.AppendSwitch(switches::kUnlimitedQuotaForFiles);
+
+#if defined(OS_MACOSX)
+    // Smooth scrolling confuses the scrollbar test.
+    launch_arguments_.AppendSwitch(
+      switches::kDisableMacSmoothScrollingForTesting);
+#endif
   }
 
   void RunTest(const std::string& test_case) {
     FilePath test_path;
     PathService::Get(base::DIR_SOURCE_ROOT, &test_path);
     test_path = test_path.Append(FILE_PATH_LITERAL("ppapi"));
     test_path = test_path.Append(FILE_PATH_LITERAL("tests"));
     test_path = test_path.Append(FILE_PATH_LITERAL("test_case.html"));
 
     // Sanity check the file name.
@@ skipping 204 matching lines @@
 TEST_F(OutOfProcessPPAPITest, FAILS_Transport) {
   RunTestViaHTTP("Transport");
 }
 #endif // ENABLE_P2P_APIS
 
 TEST_PPAPI_IN_PROCESS(UMA)
 // There is no proxy.
 TEST_F(OutOfProcessPPAPITest, FAILS_UMA) {
   RunTest("UMA");
 }