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

cc/test/render_pass_test_utils.cc

Index: cc/test/render_pass_test_utils.cc
diff --git a/cc/test/render_pass_test_utils.cc b/cc/test/render_pass_test_utils.cc
index e9614c4e0f2d4b4cb7219ac22cbfd36358e69c6d..94d0f648c440a38026a7507bb6c6ed46dcbdaa66 100644
--- a/cc/test/render_pass_test_utils.cc
+++ b/cc/test/render_pass_test_utils.cc
@@ -15,14 +15,14 @@
 
 namespace cc {
 
-TestRenderPass* AddRenderPass(RenderPassList& pass_list,
+TestRenderPass* AddRenderPass(RenderPassList* pass_list,
                               RenderPass::Id id,
                               gfx::Rect output_rect,
                               const gfx::Transform& root_transform) {
   scoped_ptr<TestRenderPass> pass(TestRenderPass::Create());
   pass->SetNew(id, output_rect, output_rect, root_transform);
   TestRenderPass* saved = pass.get();
-  pass_list.push_back(pass.PassAs<RenderPass>());
+  pass_list->push_back(pass.PassAs<RenderPass>());
   return saved;
 }