Disable all the browser_tests that are flaking more than 5% of the time on trybots.

extensions/renderer/script_context_browsertest.cc

Index: extensions/renderer/script_context_browsertest.cc
diff --git a/extensions/renderer/script_context_browsertest.cc b/extensions/renderer/script_context_browsertest.cc
index 7a1bb7af57207cdf541fc3de230e98f49e7f9a7d..cdbf1702ea6101fa8191a54c4c67bbca3062f8f5 100644
--- a/extensions/renderer/script_context_browsertest.cc
+++ b/extensions/renderer/script_context_browsertest.cc
@@ -21,15 +21,8 @@ class ScriptContextTest : public content::RenderViewTest {
   }
 };
 
-// ScriptContextTest.GetEffectiveDocumentURL is flaky on Windows
-// (http://crbug.com/391894)
-#if defined(OS_WIN)
-#define MAYBE_GetEffectiveDocumentURL DISABLED_GetEffectiveDocumentURL
-#else
-#define MAYBE_GetEffectiveDocumentURL GetEffectiveDocumentURL
-#endif
-
-TEST_F(ScriptContextTest, MAYBE_GetEffectiveDocumentURL) {
+// http://crbug.com/391894
+TEST_F(ScriptContextTest, DISABLED_GetEffectiveDocumentURL) {
   GURL top_url("http://example.com/");
   GURL different_url("http://example.net/");
   GURL blank_url("about:blank");