Added showing slow scroll rectangles in Layers panel.

LayoutTests/inspector/layers/layer-scroll-rects-get-expected.txt

Index: LayoutTests/inspector/layers/layer-scroll-rects-get-expected.txt
diff --git a/LayoutTests/inspector/layers/layer-scroll-rects-get-expected.txt b/LayoutTests/inspector/layers/layer-scroll-rects-get-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..55cc83b949928ef03a3db8a7a96c7cf45b811e9d
--- /dev/null
+++ b/LayoutTests/inspector/layers/layer-scroll-rects-get-expected.txt
@@ -0,0 +1,40 @@
+Touch me!
+Scroll rectangles
+View elements dump
+scrollRect: {
+    rect : {
+        height : 20
+        width : 185
+        x : 0
+        y : 0
+    }
+    type : "TouchEventHandler"
+}
+scrollRect: {
+    rect : {
+        height : 20
+        width : 200
+        x : 8
+        y : 8
+    }
+    type : "RepaintsOnScroll"
+}
+scrollRect: {
+    rect : {
+        height : 600
+        width : 800
+        x : 0
+        y : 0
+    }
+    type : "WheelEventHandler"
+}
+scrollRect: {
+    rect : {
+        height : 20
+        width : 200
+        x : 8
+        y : 8
+    }
+    type : "TouchEventHandler"
+}
+