Remove top controls layer from cc/.

cc/layer_tree_host.cc

Index: cc/layer_tree_host.cc
diff --git a/cc/layer_tree_host.cc b/cc/layer_tree_host.cc
index b2f930ac2052486e32b75000154b0be201931289..105e92dc2b195bb80eda63619d0a3a7557136227 100644
--- a/cc/layer_tree_host.cc
+++ b/cc/layer_tree_host.cc
@@ -299,9 +299,6 @@ void LayerTreeHost::finishCommitOnImplThread(LayerTreeHostImpl* hostImpl)
     hostImpl->setPageScaleFactorAndLimits(m_pageScaleFactor, m_minPageScaleFactor, m_maxPageScaleFactor);
     hostImpl->setDebugState(m_debugState);
 
-    if (m_settings.calculateTopControlsPosition && m_topControlsContentLayer && hostImpl->topControlsManager())
-        hostImpl->topControlsManager()->set_content_layer_id(m_topControlsContentLayer->id());
-
     m_commitNumber++;
 }
 
@@ -440,8 +437,6 @@ void LayerTreeHost::setRootLayer(scoped_refptr<Layer> rootLayer)
 
     if (m_hudLayer)
         m_hudLayer->removeFromParent();
-    if (m_topControlsContentLayer)
-        m_topControlsContentLayer->removeFromParent();
 
     setNeedsFullTreeSync();
 }
@@ -538,22 +533,6 @@ void LayerTreeHost::updateLayers(ResourceUpdateQueue& queue, size_t memoryAlloca
     if (memoryAllocationLimitBytes)
         m_contentsTextureManager->setMaxMemoryLimitBytes(memoryAllocationLimitBytes);
 
-    if (m_settings.calculateTopControlsPosition) {
-        if (!m_topControlsContentLayer) {
-            m_topControlsContentLayer = Layer::create();
-            m_topControlsContentLayer->setIsDrawable(false);
-            m_topControlsContentLayer->setDebugName("Top Controls Content");
-        }
-
-        // Insert a layer that allows the top controls manager to move around
-        // the content without clobbering/being clobbered by other transforms.
-        if (!LayerTreeHostCommon::findLayerInSubtree(m_rootLayer.get(), m_topControlsContentLayer->id())) {
-            m_topControlsContentLayer->setLayerTreeHost(m_rootLayer->layerTreeHost());
-            m_topControlsContentLayer->setChildren(m_rootLayer->children());
-            m_rootLayer->addChild(m_topControlsContentLayer);
-        }
-    }
-
     updateLayers(rootLayer(), queue);
 }