Disable CaptureVisibleTabPng on choromeos

This timeouts out often on chromeos.

BUG=83876
TEST=browser_tests on chromeos will no longer hang.

Review URL: http://codereview.chromium.org/7077002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@86771 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/extensions/extension_tabs_apitest.cc

@@ -97,8 +97,13 @@ IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_TabOnRemoved) {
   ASSERT_TRUE(RunExtensionTest("tabs/on_removed")) << message_;
 }
 
-// Test is flaky. See http://crbug.com/83876
-IN_PROC_BROWSER_TEST_F(ExtensionApiTest, FLAKY_CaptureVisibleTabJpeg) {
+// Test is timing out on cros and flaky on others. See http://crbug.com/83876
+#if defined(OS_CHROMEOS)
+#define MAYBE_CaptureVisibleTabJpeg DISABLED_CaptureVisibleTabJpeg
+#else
+#define MAYBE_CaptureVisibleTabJpeg FLAKY_CaptureVisibleTabJpeg
+#endif
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_CaptureVisibleTabJpeg) {
   host_resolver()->AddRule("a.com", "127.0.0.1");
   host_resolver()->AddRule("b.com", "127.0.0.1");
   ASSERT_TRUE(StartTestServer());