cc: Fix capitalization style in chromified files.

cc/layers/picture_image_layer_impl.cc

 // Copyright 2013 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/picture_image_layer_impl.h"
 
 #include "cc/debug/debug_colors.h"
 #include "cc/trees/layer_tree_impl.h"
 
 namespace cc {
 
-PictureImageLayerImpl::PictureImageLayerImpl(LayerTreeImpl* treeImpl, int id)
-    : PictureLayerImpl(treeImpl, id) {
+PictureImageLayerImpl::PictureImageLayerImpl(LayerTreeImpl* tree_impl, int id)
+    : PictureLayerImpl(tree_impl, id) {
 }
 
 PictureImageLayerImpl::~PictureImageLayerImpl() {
 }
 
 const char* PictureImageLayerImpl::LayerTypeAsString() const {
   return "PictureImageLayer";
 }
 
 scoped_ptr<LayerImpl> PictureImageLayerImpl::CreateLayerImpl(
-    LayerTreeImpl* treeImpl) {
-  return PictureImageLayerImpl::Create(treeImpl, id()).PassAs<LayerImpl>();
+    LayerTreeImpl* tree_impl) {
+  return PictureImageLayerImpl::Create(tree_impl, id()).PassAs<LayerImpl>();
 }
 
 void PictureImageLayerImpl::GetDebugBorderProperties(
     SkColor* color, float* width) const {
   *color = DebugColors::ImageLayerBorderColor();
   *width = DebugColors::ImageLayerBorderWidth(layer_tree_impl());
 }
 
 void PictureImageLayerImpl::CalculateRasterContentsScale(
     bool animating_transform_to_screen,
     float* raster_contents_scale,
     float* low_res_raster_contents_scale) {
   // Don't scale images during rastering to ensure image quality, save memory
   // and avoid frequent re-rastering on change of scale.
   *raster_contents_scale = std::max(1.f, MinimumContentsScale());
   // We don't need low res tiles.
   *low_res_raster_contents_scale = *raster_contents_scale;
 }
 
 }  // namespace cc