Add HandleScopes to V8DOMActivityLogger's methods

Since these V8DOMActivityLogger's methods can be called from core/
(not via bindings/), it makes sense to allocate a new HandleScope
in these methods.

BUG=411445
NOTRY=true

Review URL: https://codereview.chromium.org/559813002

git-svn-id: svn://svn.chromium.org/blink/trunk@181694 bbb929c8-8fbe-4397-9dbb-9b2b20218538

third_party/WebKit/Source/bindings/core/v8/V8DOMActivityLogger.cpp

@@ -75,6 +75,7 @@ V8DOMActivityLogger* V8DOMActivityLogger::currentActivityLogger()
     if (!isolate->InContext())
         return 0;
 
+    v8::HandleScope handleScope(isolate);
     v8::Handle<v8::Context> context = isolate->GetCurrentContext();
     if (context.IsEmpty() || !toDOMWindow(context))
         return 0;
@@ -92,6 +93,7 @@ V8DOMActivityLogger* V8DOMActivityLogger::currentActivityLoggerIfIsolatedWorld()
     if (!isolate->InContext())
         return 0;
 
+    v8::HandleScope handleScope(isolate);
     v8::Handle<v8::Context> context = isolate->GetCurrentContext();
     if (context.IsEmpty() || !toDOMWindow(context))
         return 0;