Add a |scope| argument to TRACE_EVENT_INSTANT* and require its presence.

content/common/android/trace_event_binding.cc

Index: content/common/android/trace_event_binding.cc
diff --git a/content/common/android/trace_event_binding.cc b/content/common/android/trace_event_binding.cc
index 04607ed20318e648789da8e7b09e703e77f47803..ec70335c099500861ecd96750c720c1999f5c716 100644
--- a/content/common/android/trace_event_binding.cc
+++ b/content/common/android/trace_event_binding.cc
@@ -89,9 +89,11 @@ static void Instant(JNIEnv* env, jclass clazz,
   TraceEventDataConverter converter(env, jname, jarg);
   if (converter.arg()) {
     TRACE_EVENT_COPY_INSTANT1(kJavaCategory, converter.name(),
+                              TRACE_EVENT_SCOPE_THREAD,
                               converter.arg_name(), converter.arg());
   } else {
-    TRACE_EVENT_COPY_INSTANT0(kJavaCategory, converter.name());
+    TRACE_EVENT_COPY_INSTANT0(kJavaCategory, converter.name(),
+                              TRACE_EVENT_SCOPE_THREAD);
   }
 }