Include linux_trusty_blink_rel in CQ for paint changes

Some paint code has special DCHECK paths. Some CL may pass with DCHECK
but fail without DCHECK. We need a CQ bot to ensure the non-DCHECK path
is not broken.

Bug: 794424
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: I184efbd8e07a14bd6f4d4767d42c2d14007b957a
Reviewed-on: https://chromium-review.googlesource.com/823762Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#523827}

third_party/WebKit/PRESUBMIT.py

@@ -235,9 +235,11 @@ def PostUploadHook(cl, change, output_api):  # pylint: disable=C0103
         results.extend(output_api.EnsureCQIncludeTrybotsAreAdded(
             cl,
             ['master.tryserver.chromium.linux:'
-             'linux_layout_tests_slimming_paint_v2'],
-            'Automatically added slimming-paint-v2 tests to run on CQ due to '
-            'changes in paint or compositing directories.'))
+             'linux_layout_tests_slimming_paint_v2',
+             'master.tryserver.blink:linux_trusty_blink_rel'],
+            'Automatically added linux_layout_tests_slimming_paint_v2 and '
+            'linux_trusty_blink_rel to run on CQ due to changes in paint or '
+            'compositing directories.'))
     if _AreLayoutNGDirectoriesModified(change):
         results.extend(output_api.EnsureCQIncludeTrybotsAreAdded(
             cl,

third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp

@@ -868,9 +868,10 @@ PaintResult PaintLayerPainter::PaintChildren(
 
   IntSize scroll_offset_accumulation_for_children =
       painting_info.scroll_offset_accumulation;
-  if (paint_layer_.GetLayoutObject().HasOverflowClip())
+  if (paint_layer_.GetLayoutObject().HasOverflowClip()) {
     scroll_offset_accumulation_for_children +=
         paint_layer_.GetLayoutBox()->ScrolledContentOffset();
+  }
 
   for (; child; child = iterator.Next()) {
     // If this Layer should paint into its own backing or a grouped backing,