Add flag for drawing layers to screen with Ganesh

cc/resources/picture.cc

 // 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.
 
 #include "cc/resources/picture.h"
 
 #include <algorithm>
 #include <limits>
 #include <set>
 
@@ skipping 190 matching lines @@
   SkCanvas* canvas = picture_->beginRecording(
       layer_rect_.width(),
       layer_rect_.height(),
       SkPicture::kUsePathBoundsForClip_RecordingFlag |
       SkPicture::kOptimizeForClippedPlayback_RecordingFlag);
 
   canvas->save();
   canvas->translate(SkFloatToScalar(-layer_rect_.x()),
                     SkFloatToScalar(-layer_rect_.y()));
 
-  SkPaint paint;
-  paint.setAntiAlias(false);
-  paint.setXfermodeMode(SkXfermode::kClear_Mode);
   SkRect layer_skrect = SkRect::MakeXYWH(layer_rect_.x(),
                                          layer_rect_.y(),
                                          layer_rect_.width(),
                                          layer_rect_.height());
   canvas->clipRect(layer_skrect);
-  canvas->drawRect(layer_skrect, paint);
 
   gfx::RectF opaque_layer_rect;
   base::TimeTicks begin_record_time;
   if (stats)
     begin_record_time = base::TimeTicks::Now();
   painter->PaintContents(canvas, layer_rect_, &opaque_layer_rect);
   if (stats) {
     stats->total_record_time += base::TimeTicks::Now() - begin_record_time;
     stats->total_pixels_recorded +=
         layer_rect_.width() * layer_rect_.height();
@@ skipping 222 matching lines @@
   raster_data->Set("picture_id", TracedValue::CreateIDRef(this).release());
   raster_data->SetDouble("scale", scale);
   raster_data->SetDouble("rect_x", rect.x());
   raster_data->SetDouble("rect_y", rect.y());
   raster_data->SetDouble("rect_width", rect.width());
   raster_data->SetDouble("rect_height", rect.height());
   return TracedValue::FromValue(raster_data.release());
 }
 
 }  // namespace cc