Added property id comments to CSSDescriptorIndices entries.

third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl

Index: third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl
diff --git a/third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl b/third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl
index b78f752ae39a7f37f3efaddf966da72b98c5b664..7903c3b680192164ada4ea55b0dee379bb8ac6be 100644
--- a/third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl
+++ b/third_party/WebKit/Source/build/scripts/templates/CSSPropertyDescriptor.cpp.tmpl
@@ -1,3 +1,4 @@
+{% from 'macros.tmpl' import license, print_if %}
 // 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.
@@ -45,8 +46,8 @@ static_assert(cssPropertyDescriptors[INVALID_DESCRIPTOR_INDEX].{{api_method_name
 // Lookup table mapping CSSPropertyID to index in the cssPropertyDescriptors
 // table
 static size_t CSSDescriptorIndices[] = {
-   {% for id in descriptor_indices %}
-   {{id}},
+   {% for item in descriptor_indices %}
+   {{descriptor_indices[item].id}},{{print_if(descriptor_indices[item].api != None, ' // ' ~ descriptor_indices[item].api)}}
    {% endfor %}
 };