Enable slimming paint for fast/repaint

LayoutTests/platform/android/fast/repaint/bugzilla-6388-expected.txt

Index: LayoutTests/platform/android/fast/repaint/bugzilla-6388-expected.txt
diff --git a/LayoutTests/platform/android/fast/repaint/bugzilla-6388-expected.txt b/LayoutTests/platform/android/fast/repaint/bugzilla-6388-expected.txt
index e6a0767256c10586a1eca7a319564bf340b7e5b8..de83a6f9a770cd35ea80f195337a1d48dc9ac1fd 100644
--- a/LayoutTests/platform/android/fast/repaint/bugzilla-6388-expected.txt
+++ b/LayoutTests/platform/android/fast/repaint/bugzilla-6388-expected.txt
@@ -1,37 +1,15 @@
-layer at (0,0) size 800x600
-  LayoutView at (0,0) size 800x600
-layer at (0,0) size 800x264
-  LayoutBlockFlow {HTML} at (0,0) size 800x264
-    LayoutBlockFlow {BODY} at (8,16) size 784x240
-      LayoutBlockFlow {P} at (0,0) size 784x20
-        LayoutInline {B} at (0,0) size 61x19
-          LayoutText {#text} at (0,0) size 61x19
-            text run at (0,0) width 61: "BUG ID:"
-        LayoutText {#text} at (61,0) size 4x19
-          text run at (61,0) width 4: " "
-        LayoutInline {A} at (0,0) size 108x19 [color=#0000EE]
-          LayoutText {#text} at (65,0) size 108x19
-            text run at (65,0) width 108: "Bugzilla bug 6388"
-        LayoutText {#text} at (173,0) size 465x19
-          text run at (173,0) width 465: " REGRESSION: Incomplete repaint when dragging the map on Google maps"
-      LayoutBlockFlow {P} at (0,36) size 784x26 [bgcolor=#98FB98]
-        LayoutInline {B} at (0,0) size 86x19
-          LayoutText {#text} at (3,3) size 86x19
-            text run at (3,3) width 86: "TEST PASS:"
-        LayoutText {#text} at (89,3) size 227x19
-          text run at (89,3) width 4: " "
-          text run at (93,3) width 223: "The blue square will change to green."
-      LayoutBlockFlow {P} at (0,78) size 784x26 [bgcolor=#FF3300]
-        LayoutInline {B} at (0,0) size 84x19
-          LayoutText {#text} at (3,3) size 84x19
-            text run at (3,3) width 84: "TEST FAIL:"
-        LayoutText {#text} at (87,3) size 264x19
-          text run at (87,3) width 4: " "
-          text run at (91,3) width 260: "The blue square will NOT change to green."
-      LayoutBlockFlow (anonymous) at (0,220) size 784x20
-        LayoutBR {BR} at (0,0) size 0x19
-layer at (8,136) size 100x100
-  LayoutBlockFlow (relative positioned) {DIV} at (0,120) size 100x100
-layer at (-92,136) size 200x100 backgroundClip at (8,136) size 100x100 clip at (8,136) size 100x100 outlineClip at (8,136) size 100x100
-  LayoutBlockFlow (positioned) {DIV} at (0,0) size 200x100 [bgcolor=#008000]
-    LayoutBlockFlow {DIV} at (0,0) size 100x100 [bgcolor=#0000FF]
+{
+  "bounds": [800, 600],
+  "children": [
+    {
+      "bounds": [800, 600],
+      "contentsOpaque": true,
+      "drawsContent": true,
+      "repaintRects": [
+        [8, 136, 100, 100],
+        [8, 136, 100, 100]
+      ]
+    }
+  ]
+}
+