Increase reliablity of scorllingcoordinator layout tests

LayoutTests/scrollingcoordinator/non-fast-scrollable-region-transformed-iframe-expected.txt

Index: LayoutTests/scrollingcoordinator/non-fast-scrollable-region-transformed-iframe-expected.txt
diff --git a/LayoutTests/scrollingcoordinator/non-fast-scrollable-region-transformed-iframe-expected.txt b/LayoutTests/scrollingcoordinator/non-fast-scrollable-region-transformed-iframe-expected.txt
index d6f23f47c2739d8e49db2fff28812c969acf8cf0..fcba57ee2ea211ae7392dce3bc6d0df59d4624ab 100644
--- a/LayoutTests/scrollingcoordinator/non-fast-scrollable-region-transformed-iframe-expected.txt
+++ b/LayoutTests/scrollingcoordinator/non-fast-scrollable-region-transformed-iframe-expected.txt
@@ -1,16 +1,12 @@
-layer at (0,0) size 800x600
-  RenderView at (0,0) size 800x600
-layer at (0,0) size 800x8
-  RenderBlock {HTML} at (0,0) size 800x8
-    RenderBody {BODY} at (8,8) size 784x0
-layer at (200,150) size 324x224
-  RenderPartObject {IFRAME} at (200,150) size 324x224 [border: (2px inset #EEEEEE)]
-    layer at (0,0) size 300x200 clip at (0,0) size 285x185 scrollWidth 1008 scrollHeight 1016
-      RenderView at (0,0) size 300x200
-    layer at (0,0) size 285x1016 backgroundClip at (0,0) size 285x185 clip at (0,0) size 285x185 outlineClip at (0,0) size 285x185
-      RenderBlock {HTML} at (0,0) size 285x1016
-        RenderBody {BODY} at (8,8) size 1000x1000
-layer at (0,0) size 0x0 transparent
-  RenderBlock (positioned) {DIV} at (0,0) size 0x0
-layer at (62,62) size 600x400
-  RenderBlock (positioned) {DIV} at (62,62) size 600x400 [bgcolor=#00FF00]
+
+This test ensures non-fast scrollable areas are calculated correctly when page is scaled.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS nonFastScrollableRects.length is 1
+PASS rectToString(nonFastScrollableRects[0]) is "[150, 150, 240, 240]"
+PASS successfullyParsed is true
+
+TEST COMPLETE
+