Change cc::ElementId to be a uint64_t

third_party/WebKit/Source/platform/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
@@ skipping 1821 matching lines @@
     "geometry/FloatRectTest.cpp",
     "geometry/FloatRoundedRectTest.cpp",
     "geometry/FloatSizeTest.cpp",
     "geometry/GeometryTestHelpers.cpp",
     "geometry/GeometryTestHelpers.h",
     "geometry/IntRectTest.cpp",
     "geometry/LayoutRectOutsetsTest.cpp",
     "geometry/LayoutRectTest.cpp",
     "geometry/RegionTest.cpp",
     "graphics/BitmapImageTest.cpp",
+    "graphics/CompositorElementIdTest.cpp",
     "graphics/CompositorMutableStateTest.cpp",
     "graphics/CompositorMutatorClientTest.cpp",
     "graphics/ContiguousContainerTest.cpp",
     "graphics/DeferredImageDecoderTestWoPlatform.cpp",
     "graphics/GraphicsContextTest.cpp",
     "graphics/PaintInvalidationReasonTest.cpp",
     "graphics/RecordingImageBufferSurfaceTest.cpp",
     "graphics/compositing/PaintArtifactCompositorTest.cpp",
     "graphics/filters/ImageFilterBuilderTest.cpp",
     "graphics/gpu/DrawingBufferTest.cpp",
@@ skipping 381 matching lines @@
     "//third_party/WebKit/Source:config",
     "//third_party/WebKit/Source:inside_blink",
   ]
 
   deps = [
     ":test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }