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

cc/layers/layer_impl_unittest.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/layers/layer_impl.h"
 
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/fake_output_surface.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "cc/trees/single_thread_proxy.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebFilterOperation.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebFilterOperations.h"
 #include "third_party/skia/include/effects/SkBlurImageFilter.h"
 
-using namespace WebKit;
+using WebKit::WebFilterOperation;
+using WebKit::WebFilterOperations;
 
 namespace cc {
 namespace {
 
 #define EXECUTE_AND_VERIFY_SUBTREE_CHANGED(code_to_test)                       \
   root->ResetAllChangeTrackingForSubtree();                                    \
   code_to_test;                                                                \
   EXPECT_TRUE(root->LayerPropertyChanged());                                   \
   EXPECT_TRUE(child->LayerPropertyChanged());                                  \
   EXPECT_TRUE(grand_child->LayerPropertyChanged());                            \
@@ skipping 264 matching lines @@
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetOpacity(arbitrary_number));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetTransform(arbitrary_transform));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(
       root->SetSublayerTransform(arbitrary_transform));
   VERIFY_NO_NEEDS_UPDATE_DRAW_PROPERTIES(root->SetBounds(arbitrary_size));
 }
 
 }  // namespace
 }  // namespace cc