Change cc::ElementId to be a uint64_t

third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.cpp

Index: third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.cpp b/third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.cpp
index 8ee5702ec6883ceaef2beca929d8d82f37607da1..7b3e20865fd8818be998f96f70c9eccaa3fb6454 100644
--- a/third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.cpp
+++ b/third_party/WebKit/Source/platform/graphics/paint/EffectPaintPropertyNode.cpp
@@ -36,13 +36,12 @@ cc::Layer* EffectPaintPropertyNode::EnsureDummyLayer() const {
 String EffectPaintPropertyNode::ToString() const {
   return String::Format(
       "parent=%p localTransformSpace=%p outputClip=%p opacity=%f filter=%s "
-      "blendMode=%s directCompositingReasons=%s compositorElementId=(%d, %d) "
+      "blendMode=%s directCompositingReasons=%s compositorElementId=%d "
       "paintOffset=%s",
       parent_.Get(), local_transform_space_.Get(), output_clip_.Get(), opacity_,
       filter_.ToString().Ascii().data(), SkBlendMode_Name(blend_mode_),
       CompositingReasonsAsString(direct_compositing_reasons_).Ascii().data(),
-      compositor_element_id_.primaryId, compositor_element_id_.secondaryId,
-      paint_offset_.ToString().Ascii().data());
+      compositor_element_id_, paint_offset_.ToString().Ascii().data());
 }
 
 #if DCHECK_IS_ON()