cc: Remove RenderingStats passed to ContentLayerUpdater during Layer::Update()

cc/resources/content_layer_updater.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/resources/content_layer_updater.h"
 
 #include "base/debug/trace_event.h"
 #include "base/time.h"
 #include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/resources/layer_painter.h"
@@ skipping 18 matching lines @@
 
 void ContentLayerUpdater::set_rendering_stats_instrumentation(
     RenderingStatsInstrumentation* rsi) {
   rendering_stats_instrumentation_ = rsi;
 }
 
 void ContentLayerUpdater::PaintContents(SkCanvas* canvas,
                                         gfx::Rect content_rect,
                                         float contents_width_scale,
                                         float contents_height_scale,
-                                        gfx::Rect* resulting_opaque_rect,
-                                        RenderingStats* stats) {
+                                        gfx::Rect* resulting_opaque_rect) {
   TRACE_EVENT0("cc", "ContentLayerUpdater::PaintContents");
   canvas->save();
   canvas->translate(SkFloatToScalar(-content_rect.x()),
                     SkFloatToScalar(-content_rect.y()));
 
   gfx::Rect layer_rect = content_rect;
 
   if (contents_width_scale != 1.f || contents_height_scale != 1.f) {
     canvas->scale(SkFloatToScalar(contents_width_scale),
                   SkFloatToScalar(contents_height_scale));
@@ skipping 15 matching lines @@
   canvas->restore();
 
   gfx::Rect opaque_content_rect = gfx::ToEnclosedRect(gfx::ScaleRect(
       opaque_layer_rect, contents_width_scale, contents_height_scale));
   *resulting_opaque_rect = opaque_content_rect;
 
   content_rect_ = content_rect;
 }
 
 }  // namespace cc