Add initial CC support for scroll-blocks-on

cc/layers/scrollbar_layer_unittest.cc

Index: cc/layers/scrollbar_layer_unittest.cc
diff --git a/cc/layers/scrollbar_layer_unittest.cc b/cc/layers/scrollbar_layer_unittest.cc
index 09de7d02cd634dfe9d01fa2958cf9d52d99e05f4..b24dcb1d1eecdabbd9043a5c08fd88b188efabdc 100644
--- a/cc/layers/scrollbar_layer_unittest.cc
+++ b/cc/layers/scrollbar_layer_unittest.cc
@@ -107,8 +107,8 @@ TEST(ScrollbarLayerTest, ShouldScrollNonOverlayOnMainThread) {
   // responded to on the main thread as the compositor does not yet implement
   // scrollbar scrolling.
   EXPECT_EQ(InputHandler::ScrollOnMainThread,
-            scrollbar_layer_impl->TryScroll(gfx::Point(0, 0),
-                                            InputHandler::Gesture));
+            scrollbar_layer_impl->TryScroll(
+                gfx::Point(0, 0), InputHandler::Gesture, ScrollBlocksOnNone));
 
   // Create and attach an overlay scrollbar.
   scrollbar.reset(new FakeScrollbar(false, false, true));
@@ -121,8 +121,8 @@ TEST(ScrollbarLayerTest, ShouldScrollNonOverlayOnMainThread) {
   // The user shouldn't be able to drag an overlay scrollbar and the scroll
   // may be handled in the compositor.
   EXPECT_EQ(InputHandler::ScrollIgnored,
-            scrollbar_layer_impl->TryScroll(gfx::Point(0, 0),
-                                            InputHandler::Gesture));
+            scrollbar_layer_impl->TryScroll(
+                gfx::Point(0, 0), InputHandler::Gesture, ScrollBlocksOnNone));
 }
 
 TEST(PaintedScrollbarLayerTest, ScrollOffsetSynchronization) {