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

cc/trees/occlusion_tracker.h

 // Copyright 2012 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.
 
 #ifndef CC_TREES_OCCLUSION_TRACKER_H_
 #define CC_TREES_OCCLUSION_TRACKER_H_
 
+#include <vector>
+
 #include "base/basictypes.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/region.h"
 #include "cc/layers/layer_iterator.h"
 #include "ui/gfx/rect.h"
 
 namespace cc {
 class OverdrawMetrics;
 class LayerImpl;
 class RenderSurfaceImpl;
@@ skipping 68 matching lines @@
   Region ComputeVisibleRegionInScreen() const {
     DCHECK(!stack_.back().target->parent());
     return SubtractRegions(screen_space_clip_rect_,
                            stack_.back().occlusion_from_inside_target);
   }
 
   void set_minimum_tracking_size(gfx::Size size) {
     minimum_tracking_size_ = size;
   }
 
-  // The following is used for visualization purposes. 
+  // The following is used for visualization purposes.
   void set_occluding_screen_space_rects_container(
       std::vector<gfx::Rect>* rects) {
     occluding_screen_space_rects_ = rects;
   }
   void set_non_occluding_screen_space_rects_container(
       std::vector<gfx::Rect>* rects) {
     non_occluding_screen_space_rects_ = rects;
   }
 
  protected:
   struct StackObject {
     StackObject() : target(0) {}
-    StackObject(const LayerType* target) : target(target) {}
+    explicit StackObject(const LayerType* target) : target(target) {}
     const LayerType* target;
     Region occlusion_from_outside_target;
     Region occlusion_from_inside_target;
   };
 
   // The stack holds occluded regions for subtrees in the
   // RenderSurfaceImpl-Layer tree, so that when we leave a subtree we may apply
   // a mask to it, but not to the parts outside the subtree.
   // - The first time we see a new subtree under a target, we add that target to
   // the top of the stack. This can happen as a layer representing itself, or as
@@ skipping 42 matching lines @@
 typedef OcclusionTrackerBase<Layer, RenderSurface> OcclusionTracker;
 typedef OcclusionTrackerBase<LayerImpl, RenderSurfaceImpl> OcclusionTrackerImpl;
 #if !defined(COMPILER_MSVC)
 extern template class OcclusionTrackerBase<Layer, RenderSurface>;
 extern template class OcclusionTrackerBase<LayerImpl, RenderSurfaceImpl>;
 #endif
 
 }  // namespace cc
 
 #endif  // CC_TREES_OCCLUSION_TRACKER_H_