cc: Switch RenderingStats collection in Layer::Update() to RenderingStatsInstrumentation

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.h"
+#include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/resources/layer_painter.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "third_party/skia/include/core/SkRect.h"
 #include "third_party/skia/include/core/SkScalar.h"
 #include "ui/gfx/rect_conversions.h"
 #include "ui/gfx/rect_f.h"
 
 namespace cc {
 
-ContentLayerUpdater::ContentLayerUpdater(scoped_ptr<LayerPainter> painter)
-    : painter_(painter.Pass()) {}
+ContentLayerUpdater::ContentLayerUpdater(
+    scoped_ptr<LayerPainter> painter,
+    RenderingStatsInstrumentation* stats_instrumentation)
+    : painter_(painter.Pass()),
+      rendering_stats_instrumentation_(stats_instrumentation) {}
 
 ContentLayerUpdater::~ContentLayerUpdater() {}
 
 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));
 
     gfx::RectF rect = gfx::ScaleRect(
         content_rect, 1.f / contents_width_scale, 1.f / contents_height_scale);
     layer_rect = gfx::ToEnclosingRect(rect);
   }
 
   SkPaint paint;
   paint.setAntiAlias(false);
   paint.setXfermodeMode(SkXfermode::kClear_Mode);
   SkRect layer_sk_rect = SkRect::MakeXYWH(
       layer_rect.x(), layer_rect.y(), layer_rect.width(), layer_rect.height());
   canvas->drawRect(layer_sk_rect, paint);
   canvas->clipRect(layer_sk_rect);
 
   gfx::RectF opaque_layer_rect;
-  base::TimeTicks paint_begin_time;
-  if (stats)
-    paint_begin_time = base::TimeTicks::Now();
+
+  base::TimeTicks start_time =
+      rendering_stats_instrumentation_->StartRecording();
+
   painter_->Paint(canvas, layer_rect, &opaque_layer_rect);
-  if (stats) {
-    stats->total_paint_time += base::TimeTicks::Now() - paint_begin_time;
-    stats->total_pixels_painted += content_rect.width() * content_rect.height();
-  }
+
+  base::TimeDelta duration =
+      rendering_stats_instrumentation_->EndRecording(start_time);
+  rendering_stats_instrumentation_->AddPaint(
+      duration,
+      content_rect.width() * content_rect.height());
+
   canvas->restore();
 
   gfx::RectF opaque_content_rect = gfx::ScaleRect(
       opaque_layer_rect, contents_width_scale, contents_height_scale);
   *resulting_opaque_rect = gfx::ToEnclosedRect(opaque_content_rect);
 
   content_rect_ = content_rect;
 }
 
 }  // namespace cc