Mark TtsApiTest.Provide as flaky on Windows.

chrome/browser/extensions/extension_tts_apitest.cc

 // Copyright (c) 2010 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/command_line.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_tts_api.h"
 #include "chrome/common/chrome_switches.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 162 matching lines @@
           Return(false)));
   EXPECT_CALL(mock_platform_impl_, StopSpeaking())
       .WillOnce(Return(true));
   EXPECT_CALL(mock_platform_impl_, Speak(_, _, _, _, _, _))
       .WillOnce(Return(true));
   EXPECT_CALL(mock_platform_impl_, IsSpeaking())
       .WillOnce(Return(false));
   ASSERT_TRUE(RunExtensionTest("tts/speak_error")) << message_;
 }
 
-IN_PROC_BROWSER_TEST_F(TtsApiTest, Provide) {
+#if defined(OS_WIN)
+// Flakily fails on Windows: http://crbug.com/70198
+#define MAYBE_Provide FLAKY_Provide
+#else
+#define MAYBE_Provide Provide
+#endif
+IN_PROC_BROWSER_TEST_F(TtsApiTest, MAYBE_Provide) {
   EXPECT_CALL(mock_platform_impl_, StopSpeaking())
       .WillRepeatedly(Return(true));
   EXPECT_CALL(mock_platform_impl_, IsSpeaking())
       .WillRepeatedly(Return(false));
 
   {
     InSequence s;
     EXPECT_CALL(mock_platform_impl_, Speak("native speech", _, _, _, _, _))
         .WillOnce(Return(true));
     EXPECT_CALL(mock_platform_impl_, Speak("native speech 2", _, _, _, _, _))
@@ skipping 10 matching lines @@
   CommandLine::ForCurrentProcess()->AppendSwitch(
       switches::kEnableExperimentalExtensionApis);
 
   chromeos::CrosMock crosMock;
   crosMock.InitMockSpeechSynthesisLibrary();
   crosMock.SetSpeechSynthesisLibraryExpectations();
 
   ASSERT_TRUE(RunExtensionTest("tts/chromeos")) << message_;
 }
 #endif