Revert "Disabling ChromeFrame.Launch" (r124964)

It is my belief that http://crrev.com/126334 fixes the underlying cause and that http://crrev.com/126280 makes the tests a little more robust against it.

BUG=81479
TEST=chrome_frame_tests.exe covers it
TBR=robertshield@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9699060

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@126818 0039d316-1c4b-4281-b951-d872f2087c98

chrome_frame/test/chrome_frame_automation_mock.cc

@@ -8,10 +8,7 @@
 
 const int kLongWaitTimeout = 25 * 1000;
 
-// Note that this test fails occasionally. Disabling it altogether (rather than
-// marking as flaky to see if the failure cascades down to the next test.
-// http://crbug.com/81479
-TEST(ChromeFrame, DISABLED_Launch) {
+TEST(ChromeFrame, Launch) {
   MessageLoopForUI loop;
   AutomationMockLaunch mock_launch(&loop, kLongWaitTimeout);