Invalidate objects when containing block changed

third_party/WebKit/LayoutTests/platform/linux/fast/repaint/invalidation-after-opacity-change-subtree-expected.txt

 {
   "bounds": [785, 2350],
   "children": [
     {
       "bounds": [785, 2350],
       "contentsOpaque": true,
       "drawsContent": true,
       "repaintRects": [
         [8, 2196, 777, 107],
         [8, 2196, 639, 107],
         [8, 2046, 777, 107],
         [8, 2046, 766, 107],
+        [8, 2000, 777, 350],

[chrishtr, 2015/10/30 20:45:51]

Why the new invalidations on this test?

[Xianzhu, 2015/10/30 20:52:15]

The added invalidatPaintIncludingNonCompositingDescendants() causes this extra
invalidation, while the test previously also resulted the same rect in other
paths. This additional invalidaiton is harmless because it doesn't invalidate
more than needed.

         [8, 2000, 777, 350]
       ],
       "paintInvalidationClients": [
         "LayoutBlockFlow DIV id='container'",
         "LayoutBlockFlow (positioned) DIV id='absolute'",
         "LayoutBlockFlow P",
         "LayoutText #text",
         "InlineTextBox 'This test checks that switching opacity'",
         "InlineTextBox 'invalidates the full subtree.'",
         "LayoutBlockFlow P",
         "LayoutText #text",
         "InlineTextBox 'This text should be visible in the'",
         "InlineTextBox 'output.'",
-        "LayoutBlockFlow DIV id='container'"
+        "LayoutBlockFlow DIV id='container'",
+        "LayoutBlockFlow (positioned) DIV id='absolute'"
       ]
     }
   ]
 }