Introduce Layout*::adjustVisualRectForRasterEffects and use it for SVG hairlines.

third_party/WebKit/LayoutTests/platform/linux/paint/invalidation/svg/animated-path-inside-transformed-html-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "backgroundColor": "#FFFFFF",
       "paintInvalidations": [
         {
@@ skipping 21 matching lines @@
           "rect": [246, 106, 121, 28],
           "reason": "forced by layout"
         },
         {
           "object": "LayoutSVGText text id='text'",
           "rect": [246, 106, 121, 28],
           "reason": "full"
         },
         {
           "object": "LayoutSVGRect rect id='rect'",
-          "rect": [355, 128, 103, 101],
+          "rect": [354, 127, 105, 102],
           "reason": "full"
         },
         {
           "object": "LayoutSVGRect rect id='rect'",
-          "rect": [111, 85, 101, 100],
+          "rect": [111, 84, 101, 102],
           "reason": "full"
         },
         {
           "object": "LayoutSVGImage image id='image'",
           "rect": [352, 397, 98, 99],
           "reason": "full"
         },
         {
           "object": "LayoutSVGImage image id='image'",
           "rect": [90, 208, 98, 98],
@@ skipping 27 matching lines @@
       "object": "InlineTextBox 'This is some text'",
       "reason": "forced by layout"
     },
     {
       "object": "LayoutSVGImage image id='image'",
       "reason": "full"
     }
   ]
 }