Increase reliablity of scorllingcoordinator layout tests

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

Index: LayoutTests/scrollingcoordinator/non-fast-scrollable-region-scaled-iframe-expected.txt
diff --git a/LayoutTests/scrollingcoordinator/non-fast-scrollable-region-scaled-iframe-expected.txt b/LayoutTests/scrollingcoordinator/non-fast-scrollable-region-scaled-iframe-expected.txt
index 79fb98a7fe051d1232836f6fef0a46adc3a8fe39..dd037d6e97d87dfc04ad93c20893bf260495d361 100644
--- a/LayoutTests/scrollingcoordinator/non-fast-scrollable-region-scaled-iframe-expected.txt
+++ b/LayoutTests/scrollingcoordinator/non-fast-scrollable-region-scaled-iframe-expected.txt
@@ -1,14 +1,12 @@
-layer at (0,0) size 785x585
-  RenderView at (0,0) size 785x585
-layer at (0,0) size 785x8
-  RenderBlock {HTML} at (0,0) size 785x8
-    RenderBody {BODY} at (8,8) size 769x0
-layer at (50,50) size 324x224
-  RenderPartObject {IFRAME} at (50,50) size 324x224 [border: (2px inset #EEEEEE)]
-    layer at (0,0) size 1008x1016
-      RenderView at (0,0) size 285x185
-    layer at (0,0) size 285x1016
-      RenderBlock {HTML} at (0,0) size 285x1016
-        RenderBody {BODY} at (8,8) size 1000x1000
-layer at (31,31) size 150x100
-  RenderBlock (positioned) {DIV} at (31,31) size 150x100 [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 "[110, 110, 120, 120]"
+PASS successfullyParsed is true
+
+TEST COMPLETE
+