Revert of "win: Set is_clang=true by default" over the weekend.

chrome/browser/devtools/devtools_sanity_browsertest.cc

Index: chrome/browser/devtools/devtools_sanity_browsertest.cc
diff --git a/chrome/browser/devtools/devtools_sanity_browsertest.cc b/chrome/browser/devtools/devtools_sanity_browsertest.cc
index 52b950279bfb4b2368b9f0e0007b9f8844d9e1b0..fb8514f174b95a9420458498ad02ea291f3e3b83 100644
--- a/chrome/browser/devtools/devtools_sanity_browsertest.cc
+++ b/chrome/browser/devtools/devtools_sanity_browsertest.cc
@@ -1813,14 +1813,10 @@ class DevToolsReattachAfterCrashTest : public DevToolsSanityTest {
   }
 };
 
-// TODO(hans): Temporarily disable while enabling Clang by default on Windows
-// over the weekend. (crbug.com/727458)
-#if !(defined(OS_WIN) && defined(__clang__))
 IN_PROC_BROWSER_TEST_F(DevToolsReattachAfterCrashTest,
                        TestReattachAfterCrashOnTimeline) {
   RunTestWithPanel("timeline");
 }
-#endif
 
 IN_PROC_BROWSER_TEST_F(DevToolsReattachAfterCrashTest,
                        TestReattachAfterCrashOnNetwork) {