Change cc::ElementId to be a uint64_t

third_party/WebKit/Source/bindings/core/v8/serialization/V8ScriptValueSerializerTest.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "bindings/core/v8/serialization/V8ScriptValueSerializer.h"
 
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptController.h"
 #include "bindings/core/v8/ScriptSourceCode.h"
 #include "bindings/core/v8/V8BindingForTesting.h"
@@ skipping 506 matching lines @@
   canvas->SetPlaceholderCanvasId(519);
   v8::Local<v8::Value> wrapper = ToV8(canvas, scope.GetScriptState());
   Transferables transferables;
   transferables.offscreen_canvases.push_back(canvas);
   v8::Local<v8::Value> result =
       RoundTrip(wrapper, scope, nullptr, &transferables);
   ASSERT_TRUE(V8OffscreenCanvas::hasInstance(result, scope.GetIsolate()));
   OffscreenCanvas* new_canvas =
       V8OffscreenCanvas::toImpl(result.As<v8::Object>());
   EXPECT_EQ(IntSize(10, 7), new_canvas->Size());
-  EXPECT_EQ(519, new_canvas->PlaceholderCanvasId());
+  EXPECT_EQ(519u, new_canvas->PlaceholderCanvasId());
   EXPECT_TRUE(canvas->IsNeutered());
   EXPECT_FALSE(new_canvas->IsNeutered());
 }
 
 TEST(V8ScriptValueSerializerTest, RoundTripBlob) {
   V8TestingScope scope;
   const char kHelloWorld[] = "Hello world!";
   Blob* blob =
       Blob::Create(reinterpret_cast<const unsigned char*>(&kHelloWorld),
                    sizeof(kHelloWorld), "text/plain");
@@ skipping 563 matching lines @@
   RefPtr<SerializedScriptValue> input =
       SerializedValue({0xff, 0x80, 0x09, 0xff, 0x09, 0x54});
   EXPECT_TRUE(
       V8ScriptValueDeserializer(scope.GetScriptState(), std::move(input))
           .Deserialize()
           ->IsTrue());
 }
 
 }  // namespace
 }  // namespace blink