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

cc/layers/tiled_layer_impl_unittest.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/layers/tiled_layer_impl.h"
 
 #include "cc/layers/append_quads_data.h"
 #include "cc/quads/tile_draw_quad.h"
 #include "cc/resources/layer_tiling_data.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/layer_test_common.h"
 #include "cc/test/mock_quad_culler.h"
 #include "cc/trees/single_thread_proxy.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 namespace {
 
 class TiledLayerImplTest : public testing::Test {
  public:
   TiledLayerImplTest() : host_impl_(&proxy_) {}
 
   scoped_ptr<TiledLayerImpl> CreateLayerNoTiles(
-      const gfx::Size& tile_size,
-      const gfx::Size& layer_size,
+      gfx::Size tile_size,
+      gfx::Size layer_size,
       LayerTilingData::BorderTexelOption border_texels) {
     scoped_ptr<TiledLayerImpl> layer =
         TiledLayerImpl::Create(host_impl_.active_tree(), 1);
     scoped_ptr<LayerTilingData> tiler =
         LayerTilingData::Create(tile_size, border_texels);
     tiler->SetBounds(layer_size);
     layer->SetTilingData(*tiler);
     layer->set_skips_draw(false);
     layer->draw_properties().visible_content_rect =
         gfx::Rect(layer_size);
     layer->draw_properties().opacity = 1;
     layer->SetBounds(layer_size);
     layer->SetContentBounds(layer_size);
     layer->CreateRenderSurface();
     layer->draw_properties().render_target = layer.get();
     return layer.Pass();
   }
 
   // Create a default tiled layer with textures for all tiles and a default
   // visibility of the entire layer size.
   scoped_ptr<TiledLayerImpl> CreateLayer(
-      const gfx::Size& tile_size,
-      const gfx::Size& layer_size,
+      gfx::Size tile_size,
+      gfx::Size layer_size,
       LayerTilingData::BorderTexelOption border_texels) {
     scoped_ptr<TiledLayerImpl> layer =
         CreateLayerNoTiles(tile_size, layer_size, border_texels);
 
     layer->SetDrawsContent(true);
 
     ResourceProvider::ResourceId resource_id = 1;
     for (int i = 0; i < layer->TilingForTesting()->num_tiles_x(); ++i) {
       for (int j = 0; j < layer->TilingForTesting()->num_tiles_y(); ++j) {
         gfx::Rect opaque_rect(
             layer->TilingForTesting()->tile_bounds(i, j).origin(),
             gfx::Size(1, 1));
         layer->PushTileProperties(i, j, resource_id++, opaque_rect, false);
       }
     }
 
     return layer.Pass();
   }
 
   void GetQuads(QuadList* quads,
                 SharedQuadStateList* shared_states,
-                const gfx::Size& tile_size,
-                const gfx::Size& layer_size,
+                gfx::Size tile_size,
+                gfx::Size layer_size,
                 LayerTilingData::BorderTexelOption border_texel_option,
                 const gfx::Rect& visible_content_rect) {
     scoped_ptr<TiledLayerImpl> layer =
         CreateLayer(tile_size, layer_size, border_texel_option);
     layer->draw_properties().visible_content_rect = visible_content_rect;
     layer->SetBounds(layer_size);
 
     MockQuadCuller quad_culler(quads, shared_states);
     AppendQuadsData data;
     layer->AppendQuads(&quad_culler, &data);
@@ skipping 226 matching lines @@
   scoped_ptr<TiledLayerImpl> layer =
       CreateLayer(tile_size, layer_size, LayerTilingData::NO_BORDER_TEXELS);
 
   EXPECT_EQ(0u, layer->ContentsResourceId());
   EXPECT_EQ(0, layer->TilingForTesting()->num_tiles_x());
   EXPECT_EQ(0, layer->TilingForTesting()->num_tiles_y());
 }
 
 }  // namespace
 }  // namespace cc