Harmonize FilterEffect::mapRect and mapPaintRect

third_party/WebKit/LayoutTests/paint/invalidation/filters/effect-reference-repaint-gaussianblur-expected.txt

Index: third_party/WebKit/LayoutTests/paint/invalidation/filters/effect-reference-repaint-gaussianblur-expected.txt
diff --git a/third_party/WebKit/LayoutTests/paint/invalidation/filters/effect-reference-repaint-gaussianblur-expected.txt b/third_party/WebKit/LayoutTests/paint/invalidation/filters/effect-reference-repaint-gaussianblur-expected.txt
index 8954704801f73d8d36f2d1dad6ea7928916cfbc8..dbba95ce8b3a27a91fa78af9cbb2d8bc98c12f31 100644
--- a/third_party/WebKit/LayoutTests/paint/invalidation/filters/effect-reference-repaint-gaussianblur-expected.txt
+++ b/third_party/WebKit/LayoutTests/paint/invalidation/filters/effect-reference-repaint-gaussianblur-expected.txt
@@ -10,7 +10,7 @@
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow DIV class='box'",
-          "rect": [1, -7, 314, 314],
+          "rect": [38, 30, 240, 240],

[Stephen White, 2016/09/20 19:46:38]

This still looks suspiciously small to me. Shouldn't it be 320x320-ish?

[fs, 2016/09/20 21:50:25]

I thought would be able to pick up the new result from the bots, but that didn't
work out. Should be back to the original (314x314) now though.

           "reason": "style change"
         }
       ]