Fix for sync filesystem app crash.

content/child/fileapi/webfilesystem_impl.cc

Index: content/child/fileapi/webfilesystem_impl.cc
diff --git a/content/child/fileapi/webfilesystem_impl.cc b/content/child/fileapi/webfilesystem_impl.cc
index 848079f09ae63d4f5730b3ba3c42f757b2bb17bb..640e57fa8749df299516d8b257b3bac26f0d64c6 100644
--- a/content/child/fileapi/webfilesystem_impl.cc
+++ b/content/child/fileapi/webfilesystem_impl.cc
@@ -25,7 +25,6 @@
 #include "third_party/WebKit/public/platform/WebFileSystemCallbacks.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
-#include "third_party/WebKit/public/web/WebHeap.h"
 #include "url/gurl.h"
 
 using base::MakeTuple;
@@ -52,10 +51,7 @@ class WebFileSystemImpl::WaitableCallbackResults
   }
 
   void WaitAndRun() {
-    {
-      blink::WebHeap::SafePointScope safe_point;
-      results_available_event_.Wait();
-    }
+    results_available_event_.Wait();
     Run();
   }