[cc] Make LayerImpls point at LayerTreeImpl instead of LTHI

cc/nine_patch_layer_impl_unittest.cc

Index: cc/nine_patch_layer_impl_unittest.cc
diff --git a/cc/nine_patch_layer_impl_unittest.cc b/cc/nine_patch_layer_impl_unittest.cc
index 058e94b20028fde3743cb053f47a341da4f94a8e..aa9bc01bb4fbbdecfb6b8d38ff979c2eafcc40a5 100644
--- a/cc/nine_patch_layer_impl_unittest.cc
+++ b/cc/nine_patch_layer_impl_unittest.cc
@@ -41,7 +41,7 @@ TEST(NinePatchLayerImplTest, verifyDrawQuads)
 
     FakeImplProxy proxy;
     FakeLayerTreeHostImpl hostImpl(&proxy);
-    scoped_ptr<NinePatchLayerImpl> layer = NinePatchLayerImpl::create(&hostImpl, 1);
+    scoped_ptr<NinePatchLayerImpl> layer = NinePatchLayerImpl::create(hostImpl.activeTree(), 1);
     layer->drawProperties().visible_content_rect = visibleContentRect;
     layer->setBounds(layerSize);
     layer->setContentBounds(layerSize);
@@ -102,7 +102,7 @@ TEST(NinePatchLayerImplTest, verifyDrawQuadsForSqueezedLayer)
 
     FakeImplProxy proxy;
     FakeLayerTreeHostImpl hostImpl(&proxy);
-    scoped_ptr<NinePatchLayerImpl> layer = NinePatchLayerImpl::create(&hostImpl, 1);
+    scoped_ptr<NinePatchLayerImpl> layer = NinePatchLayerImpl::create(hostImpl.activeTree(), 1);
     layer->drawProperties().visible_content_rect = visibleContentRect;
     layer->setBounds(layerSize);
     layer->setContentBounds(layerSize);