Add scrolling related getters to WebLayerImpl

cc/LayerChromium.h

Index: cc/LayerChromium.h
diff --git a/cc/LayerChromium.h b/cc/LayerChromium.h
index 583a4482c6fcc4e70e3a276753f3aea0a02df69d..f222a06480c9ea214ffc88061947dcf12883bd70 100644
--- a/cc/LayerChromium.h
+++ b/cc/LayerChromium.h
@@ -134,11 +134,17 @@ public:
 
     void setScrollable(bool);
     bool scrollable() const { return m_scrollable; }
+
     void setShouldScrollOnMainThread(bool);
+    bool shouldScrollOnMainThread() const { return m_shouldScrollOnMainThread; }
+
     void setHaveWheelEventHandlers(bool);
-    const Region& nonFastScrollableRegion() { return m_nonFastScrollableRegion; }
+    bool haveWheelEventHandlers() const { return m_haveWheelEventHandlers; }
+
     void setNonFastScrollableRegion(const Region&);
     void setNonFastScrollableRegionChanged() { m_nonFastScrollableRegionChanged = true; }
+    const Region& nonFastScrollableRegion() const { return m_nonFastScrollableRegion; }
+
     void setLayerScrollClient(WebKit::WebLayerScrollClient* layerScrollClient) { m_layerScrollClient = layerScrollClient; }
 
     void setDrawCheckerboardForMissingTiles(bool);