Fix cpplint errors in cc/(animation|input|layers|trees|test)/

cc/layers/layer_impl.h

Index: cc/layers/layer_impl.h
diff --git a/cc/layers/layer_impl.h b/cc/layers/layer_impl.h
index f33e6444c35ed7873abbf1cb7cebeffac2f3e8fc..2bee5923b75c833608da4fa9510a37321d2fe443 100644
--- a/cc/layers/layer_impl.h
+++ b/cc/layers/layer_impl.h
@@ -242,7 +242,7 @@ class CC_EXPORT LayerImpl : LayerAnimationValueObserver {
     return draw_properties_.render_target;
   }
   RenderSurfaceImpl* render_surface() const {
- return draw_properties_.render_surface.get();
+    return draw_properties_.render_surface.get();
   }
 
   // The client should be responsible for setting bounds, content bounds and
@@ -523,6 +523,6 @@ class CC_EXPORT LayerImpl : LayerAnimationValueObserver {
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
-}
+}  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_