Mark some disabled tests as flaky to increase test coverage.

chrome/browser/views/tabs/tab_dragging_test.cc

 // Copyright (c) 2006-2008 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 "base/file_util.h"
 #include "base/gfx/rect.h"
 #include "chrome/app/chrome_dll_resource.h"
 #include "chrome/browser/view_ids.h"
 #include "chrome/common/chrome_paths.h"
@@ skipping 216 matching lines @@
   ASSERT_TRUE(tab3->GetCurrentURL(&tab3_new_url));
 
   EXPECT_EQ(tab1_new_url.spec(), tab2_url.spec());
   EXPECT_EQ(tab2_new_url.spec(), tab3_url.spec());
   EXPECT_EQ(tab3_new_url.spec(), tab1_url.spec());
 }
 
 // Drag Tab_1 into the position of Tab_3, and press ESCAPE before releasing the
 // left mouse button.
 // Flaky, see http://crbug.com/21092.
-TEST_F(TabDraggingTest, DISABLED_Tab1Tab3Escape) {
+TEST_F(TabDraggingTest, FLAKY_Tab1Tab3Escape) {
   scoped_refptr<BrowserProxy> browser(automation()->GetBrowserWindow(0));
   ASSERT_TRUE(browser.get());
   scoped_refptr<WindowProxy> window(browser->GetWindow());
   ASSERT_TRUE(window.get());
 
   // Get initial tab count.
   int initial_tab_count = 0;
   ASSERT_TRUE(browser->GetTabCount(&initial_tab_count));
   ASSERT_TRUE(1 == initial_tab_count);
 
@@ skipping 228 matching lines @@
   scoped_refptr<TabProxy> tab1_2(browser2->GetTab(0));
   ASSERT_TRUE(tab1_2.get());
   GURL tab1_2_url;
   ASSERT_TRUE(tab1_2->GetCurrentURL(&tab1_2_url));
 
   // Tab_1_2 of Window 2 should essentially be Tab_2 of Window 1.
   EXPECT_EQ(tab1_2_url.spec(), tab2_url.spec());
   EXPECT_NE(tab1_2_url.spec(), tab1_url.spec());
   EXPECT_NE(tab1_2_url.spec(), tab3_url.spec());
 }