Marked GpuPixelBrowserTest::CSS3DBlueBox as flaky on windows.

chrome/test/gpu/gpu_pixel_browsertest.cc

 // Copyright (c) 2012 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_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
 #include "base/string_number_conversions.h"
 #include "base/string_util.h"
@@ skipping 441 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(GpuPixelBrowserTest);
 };
 
 // http://crbug.com/
 #if defined(OS_WIN)
 #define MAYBE_WebGLGreenTriangle DISABLED_WebGLGreenTriangle
 #else
 #define MAYBE_WebGLGreenTriangle WebGLGreenTriangle
 #endif
 
+// http://crbug.com/136430
+#if defined(OS_WIN)
+#define MAYBE_CSS3DBlueBox FLAKY_CSS3DBlueBox
+#else
+#define MAYBE_CSS3DBlueBox CSS3DBlueBox
+#endif
+
 IN_PROC_BROWSER_TEST_F(GpuPixelBrowserTest, MAYBE_WebGLGreenTriangle) {
   // If test baseline needs to be updated after a given revision, update the
   // following number. If no revision requirement, then 0.
   const int64 ref_img_revision_update = 123489;
 
   gfx::Size container_size(400, 300);
   FilePath url =
       test_data_dir().AppendASCII("pixel_webgl.html");
   RunPixelTest(container_size, url, ref_img_revision_update);
 }
 
-IN_PROC_BROWSER_TEST_F(GpuPixelBrowserTest, CSS3DBlueBox) {
+IN_PROC_BROWSER_TEST_F(GpuPixelBrowserTest, MAYBE_CSS3DBlueBox) {
   // If test baseline needs to be updated after a given revision, update the
   // following number. If no revision requirement, then 0.
   const int64 ref_img_revision_update = 123489;
 
   gfx::Size container_size(400, 300);
   FilePath url =
       test_data_dir().AppendASCII("pixel_css3d.html");
   RunPixelTest(container_size, url, ref_img_revision_update);
 }
 
@@ skipping 19 matching lines @@
 IN_PROC_BROWSER_TEST_F(Canvas2DPixelTestSD, Canvas2DRedBoxSD) {
   // If test baseline needs to be updated after a given revision, update the
   // following number. If no revision requirement, then 0.
   const int64 ref_img_revision_update = 123489;
 
   gfx::Size container_size(400, 300);
   FilePath url =
       test_data_dir().AppendASCII("pixel_canvas2d.html");
   RunPixelTest(container_size, url, ref_img_revision_update);
 }