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

cc/scheduler/texture_uploader.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/scheduler/texture_uploader.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/debug/trace_event.h"
@@ skipping 115 matching lines @@
   available_queries_.front()->End();
   pending_queries_.push_back(available_queries_.take_front());
   num_blocking_texture_uploads_++;
 }
 
 void TextureUploader::Upload(const uint8* image,
                              const gfx::Rect& image_rect,
                              const gfx::Rect& source_rect,
                              gfx::Vector2d dest_offset,
                              ResourceFormat format,
-                             const gfx::Size& size) {
+                             gfx::Size size) {
   CHECK(image_rect.Contains(source_rect));
 
   bool is_full_upload = dest_offset.IsZero() && source_rect.size() == size;
 
   if (is_full_upload)
     BeginQuery();
 
   if (format == ETC1) {
     // ETC1 does not support subimage uploads.
     DCHECK(is_full_upload);
@@ skipping 133 matching lines @@
              &image[bytes_per_pixel *
                     (offset.x() + (offset.y() + row) * image_rect.width())],
              source_rect.width() * bytes_per_pixel);
     }
   }
 
   gl_->UnmapTexSubImage2DCHROMIUM(pixel_dest);
 }
 
 void TextureUploader::UploadWithTexImageETC1(const uint8* image,
-                                             const gfx::Size& size) {
+                                             gfx::Size size) {
   TRACE_EVENT0("cc", "TextureUploader::UploadWithTexImageETC1");
   DCHECK_EQ(0, size.width() % 4);
   DCHECK_EQ(0, size.height() % 4);
 
   gl_->CompressedTexImage2D(GL_TEXTURE_2D,
                             0,
                             GLInternalFormat(ETC1),
                             size.width(),
                             size.height(),
                             0,
@@ skipping 23 matching lines @@
       textures_per_second_history_.erase(textures_per_second_history_.begin());
       textures_per_second_history_.erase(--textures_per_second_history_.end());
     }
     textures_per_second_history_.insert(textures_per_second);
 
     available_queries_.push_back(pending_queries_.take_front());
   }
 }
 
 }  // namespace cc