Catch uncaught promise rejections from V8 and log to console.

Source/bindings/core/v8/ScriptValue.cpp

 /*
  * Copyright (C) 2008, 2009, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 #include "config.h"
 #include "bindings/core/v8/ScriptValue.h"
 
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "platform/JSONValues.h"
 
 namespace blink {
 
+int ScriptValue::identityHash() const
+{
+    if (isEmpty())
+        return 0;
+    v8::HandleScope handleScope(isolate());
+    v8::Local<v8::Value> value = m_value->newLocal(isolate());
+    if (!value->IsObject())
+        return 0;
+    return v8::Local<v8::Object>::Cast(value)->GetIdentityHash();
+}
+
 v8::Handle<v8::Value> ScriptValue::v8Value() const
 {
     if (isEmpty())
         return v8::Handle<v8::Value>();
 
     ASSERT(isolate()->InContext());
 
     // This is a check to validate that you don't return a ScriptValue to a world different
     // from the world that created the ScriptValue.
     // Probably this could be:
@@ skipping 25 matching lines @@
 }
 
 PassRefPtr<JSONValue> ScriptValue::toJSONValue(ScriptState* scriptState) const
 {
     ASSERT(!scriptState->contextIsValid());
     ScriptState::Scope scope(scriptState);
     return v8ToJSONValue(scriptState->isolate(), v8Value(), JSONValue::maxDepth);
 }
 
 } // namespace blink