cc: Remove the opaque rect return-parameter from ContentLayerClient.

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 239 matching lines @@
   canvas->save();
   canvas->translate(SkFloatToScalar(-layer_rect_.x()),
                     SkFloatToScalar(-layer_rect_.y()));
 
   SkRect layer_skrect = SkRect::MakeXYWH(layer_rect_.x(),
                                          layer_rect_.y(),
                                          layer_rect_.width(),
                                          layer_rect_.height());
   canvas->clipRect(layer_skrect);
 
-  gfx::RectF opaque_layer_rect;
-  painter->PaintContents(
-      canvas.get(), layer_rect_, &opaque_layer_rect, graphics_context_status);
+  painter->PaintContents(canvas.get(), layer_rect_, graphics_context_status);
 
   canvas->restore();
   picture_ = skia::AdoptRef(recorder.endRecording());
   DCHECK(picture_);
 
   if (recording) {
     // SkRecording requires it's the only one holding onto canvas before we
     // may call releasePlayback().  (This helps enforce thread-safety.)
     canvas.clear();
     playback_.reset(recording->releasePlayback());
@@ skipping 270 matching lines @@
   scoped_refptr<base::debug::TracedValue> record_data =
       new base::debug::TracedValue();
   TracedValue::SetIDRef(this, record_data.get(), "picture_id");
   record_data->BeginArray("layer_rect");
   MathUtil::AddToTracedValue(layer_rect_, record_data.get());
   record_data->EndArray();
   return record_data;
 }
 
 }  // namespace cc