Reduce flakiness in chrome_frame_tests.exe by having each run in a clean environment.

chrome_frame/test/ui_test.cc

Index: chrome_frame/test/ui_test.cc
diff --git a/chrome_frame/test/ui_test.cc b/chrome_frame/test/ui_test.cc
index c594a8f0a16150debcef50032fb81310ca532ec2..957f36cce55ecdc3ca7a8e47d6607fd31c685998 100644
--- a/chrome_frame/test/ui_test.cc
+++ b/chrome_frame/test/ui_test.cc
@@ -803,8 +803,7 @@ TEST_F(ContextMenuTest, CFTxtFieldCut) {
 }
 
 // Test CF text field context menu - copy.
-// FLAKY: 114386.
-TEST_F(ContextMenuTest, DISABLED_CFTxtFieldCopy) {
+TEST_F(ContextMenuTest, CFTxtFieldCopy) {
   server_mock_.ExpectAndServeAnyRequests(CFInvocation::MetaTag());
   AccObjectMatcher txtfield_matcher(L"", L"editable text");