Change cc::ElementId to be a uint64_t

cc/animation/animation_player_unittest.cc

 // Copyright 2015 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 "cc/animation/animation_player.h"
 
 #include "cc/animation/animation_delegate.h"
 #include "cc/animation/animation_host.h"
 #include "cc/animation/animation_id_provider.h"
 #include "cc/animation/animation_timeline.h"
@@ skipping 376 matching lines @@
 
   EXPECT_EQ(player_, GetPlayerForElementId(element_id_));
   EXPECT_TRUE(player_->element_animations());
   EXPECT_EQ(player_->element_id(), element_id_);
 
   EXPECT_EQ(player_impl_, GetImplPlayerForLayerId(element_id_));
   EXPECT_TRUE(player_impl_->element_animations());
   EXPECT_EQ(player_impl_->element_id(), element_id_);
   EXPECT_TRUE(CheckPlayerTimelineNeedsPushProperties(false));
 
-  const ElementId new_element_id(NextTestLayerId(), 0);
+  const ElementId new_element_id(NextTestLayerId());
   player_->DetachElement();
   player_->AttachElement(new_element_id);
 
   EXPECT_EQ(player_, GetPlayerForElementId(new_element_id));
   EXPECT_TRUE(player_->element_animations());
   EXPECT_EQ(player_->element_id(), new_element_id);
   EXPECT_TRUE(CheckPlayerTimelineNeedsPushProperties(true));
 
   host_->PushPropertiesTo(host_impl_);
 
   EXPECT_EQ(player_impl_, GetImplPlayerForLayerId(new_element_id));
   EXPECT_TRUE(player_impl_->element_animations());
   EXPECT_EQ(player_impl_->element_id(), new_element_id);
 }
 
 }  // namespace
 }  // namespace cc