Revert of [#7] Pass gfx structs by const ref (gfx::Size)

cc/test/fake_picture_pile_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/test/fake_picture_pile_impl.h"
 
 #include <limits>
 #include <utility>
 
 #include "cc/test/impl_side_painting_settings.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 
 FakePicturePileImpl::FakePicturePileImpl() {}
 
 FakePicturePileImpl::~FakePicturePileImpl() {}
 
 scoped_refptr<FakePicturePileImpl> FakePicturePileImpl::CreateFilledPile(
-    const gfx::Size& tile_size,
-    const gfx::Size& layer_bounds) {
+    gfx::Size tile_size,
+    gfx::Size layer_bounds) {
   scoped_refptr<FakePicturePileImpl> pile(new FakePicturePileImpl());
   pile->tiling().SetTotalSize(layer_bounds);
   pile->tiling().SetMaxTextureSize(tile_size);
   pile->SetTileGridSize(ImplSidePaintingSettings().default_tile_size);
   for (int x = 0; x < pile->tiling().num_tiles_x(); ++x) {
     for (int y = 0; y < pile->tiling().num_tiles_y(); ++y)
       pile->AddRecordingAt(x, y);
   }
   pile->UpdateRecordedRegion();
   return pile;
 }
 
 scoped_refptr<FakePicturePileImpl> FakePicturePileImpl::CreateEmptyPile(
-    const gfx::Size& tile_size,
-    const gfx::Size& layer_bounds) {
+    gfx::Size tile_size,
+    gfx::Size layer_bounds) {
   scoped_refptr<FakePicturePileImpl> pile(new FakePicturePileImpl());
   pile->tiling().SetTotalSize(layer_bounds);
   pile->tiling().SetMaxTextureSize(tile_size);
   pile->SetTileGridSize(ImplSidePaintingSettings().default_tile_size);
   pile->UpdateRecordedRegion();
   return pile;
 }
 
 scoped_refptr<FakePicturePileImpl>
 FakePicturePileImpl::CreatePileWithRecordedRegion(
-    const gfx::Size& tile_size,
-    const gfx::Size& layer_bounds,
+    gfx::Size tile_size,
+    gfx::Size layer_bounds,
     const Region& recorded_region) {
   scoped_refptr<FakePicturePileImpl> pile(new FakePicturePileImpl());
   pile->tiling().SetTotalSize(layer_bounds);
   pile->tiling().SetMaxTextureSize(tile_size);
   pile->SetTileGridSize(ImplSidePaintingSettings().default_tile_size);
   pile->SetRecordedRegionForTesting(recorded_region);
   return pile;
 }
 
 scoped_refptr<FakePicturePileImpl> FakePicturePileImpl::CreatePile() {
@@ skipping 42 matching lines @@
 void FakePicturePileImpl::RerecordPile() {
   for (int y = 0; y < num_tiles_y(); ++y) {
     for (int x = 0; x < num_tiles_x(); ++x) {
       RemoveRecordingAt(x, y);
       AddRecordingAt(x, y);
     }
   }
 }
 
 }  // namespace cc