Apply both phsical bounding box and clip to composited bounds.

third_party/WebKit/LayoutTests/platform/linux/paint/invalidation/offset-change-wrong-invalidation-with-float-expected.txt

 {
   "layers": [
     {
       "name": "LayoutView #document",
       "bounds": [800, 600],
       "contentsOpaque": true,
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutBlockFlow (positioned) UL id='submenu'",
@@ skipping 20 matching lines @@
     {
       "name": "LayoutListItem (floating) LI id='watches'",
       "position": [30, 44],
       "transformOrigin": [18, 10],
       "bounds": [25, 19],
       "drawsContent": true
     },
     {
       "name": "LayoutInline (relative positioned) SPAN id='placeholder'",
       "position": [18, 0],
-      "bounds": [0, 19],
       "backfaceVisibility": "hidden"
     },
     {
       "name": "LayoutListItem (relative positioned) (floating) LI id='menu'",
       "position": [30, 44],
       "bounds": [18, 19],
       "drawsContent": true,
       "paintInvalidations": [
         {
           "object": "LayoutListMarker (anonymous)",
@@ skipping 20 matching lines @@
       "object": "RootInlineBox",
       "reason": "location change"
     },
     {
       "object": "LayoutListMarker (anonymous)",
       "reason": "bounds change"
     }
   ]
 }