Delete blink code for scroll-blocks-on

Source/platform/graphics/GraphicsLayer.cpp

Index: Source/platform/graphics/GraphicsLayer.cpp
diff --git a/Source/platform/graphics/GraphicsLayer.cpp b/Source/platform/graphics/GraphicsLayer.cpp
index 4d9fc9c2c1f3526c56164cb906ab027dc2c2caaf..e02d72a1b943fef02dc2600fd0912c7b9069cd79 100644
--- a/Source/platform/graphics/GraphicsLayer.cpp
+++ b/Source/platform/graphics/GraphicsLayer.cpp
@@ -119,6 +119,9 @@ GraphicsLayer::GraphicsLayer(GraphicsLayerClient* client)
     m_layer->layer()->setDrawsContent(m_drawsContent && m_contentsVisible);
     m_layer->layer()->setWebLayerClient(this);
     m_layer->setAutomaticallyComputeRasterScale(true);
+
+    // TODO(rbyers): Expose control over this to the web - crbug.com/489802:
+    setScrollBlocksOn(WebScrollBlocksOnStartTouch | WebScrollBlocksOnWheelEvent);
 }
 
 GraphicsLayer::~GraphicsLayer()
@@ -597,17 +600,6 @@ PassRefPtr<JSONObject> GraphicsLayer::layerTreeAsJSON(LayerTreeFlags flags, Rend
     if (m_blendMode != WebBlendModeNormal)
         json->setString("blendMode", compositeOperatorName(CompositeSourceOver, m_blendMode));
 
-    if ((flags & LayerTreeIncludesScrollBlocksOn) && m_scrollBlocksOn) {
-        RefPtr<JSONArray> scrollBlocksOnJSON = adoptRef(new JSONArray);
-        if (m_scrollBlocksOn & WebScrollBlocksOnStartTouch)
-            scrollBlocksOnJSON->pushString("StartTouch");
-        if (m_scrollBlocksOn & WebScrollBlocksOnWheelEvent)
-            scrollBlocksOnJSON->pushString("WheelEvent");
-        if (m_scrollBlocksOn & WebScrollBlocksOnScrollEvent)
-            scrollBlocksOnJSON->pushString("ScrollEvent");
-        json->setArray("scrollBlocksOn", scrollBlocksOnJSON);
-    }
-
     if (m_isRootForIsolatedGroup)
         json->setBoolean("isolate", m_isRootForIsolatedGroup);