Mark SessionHistoryTest.BasicBackForward as flaky on Mac.

chrome/browser/session_history_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/string_util.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/automation/automation_proxy.h"
 #include "chrome/test/automation/browser_proxy.h"
 #include "chrome/test/automation/tab_proxy.h"
 #include "chrome/test/ui/ui_test.h"
@@ skipping 62 matching lines @@
     return url;
   }
 
  protected:
   scoped_refptr<BrowserProxy> window_;
   scoped_refptr<TabProxy> tab_;
 
   net::TestServer test_server_;
 };
 
-#if defined(OS_WIN)
-// See http://crbug.com/61619
+#if defined(OS_WIN) || defined(OS_MACOSX)
+// See http://crbug.com/61619 on windows.
+// See http://crbug.com/102094 on mac.
 #define MAYBE_BasicBackForward FLAKY_BasicBackForward
 #else
 #define MAYBE_BasicBackForward BasicBackForward
 #endif
 
 TEST_F(SessionHistoryTest, MAYBE_BasicBackForward) {
   ASSERT_TRUE(test_server_.Start());
 
   // about:blank should be loaded first.
   ASSERT_FALSE(tab_->GoBack());
@@ skipping 464 matching lines @@
   ASSERT_TRUE(tab_->GoBack());
 
   // Ensure history.length is properly truncated.
   ASSERT_TRUE(tab_->NavigateToURL(test_server_.GetURL("files/title2.html")));
   ASSERT_TRUE(tab_->ExecuteAndExtractInt(
       L"", L"domAutomationController.send(history.length)", &length));
   EXPECT_EQ(2, length);
 }
 
 }  // namespace