gfx: Make conversions from Size to SizeF be explicit.

content/browser/media/capture/web_contents_video_capture_device.cc

 // Copyright (c) 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.
 //
 // Implementation notes: This needs to work on a variety of hardware
 // configurations where the speed of the CPU and GPU greatly affect overall
 // performance. Spanning several threads, the process of capturing has been
 // split up into four conceptual stages:
 //
 //   1. Reserve Buffer: Before a frame can be captured, a slot in the client's
@@ skipping 672 matching lines @@
   // shrink |optimal_size| by that amount.  Then, when external code resizes the
   // render widget to the "preferred size," the widget will be physically
   // rendered at the exact capture size, thereby eliminating unnecessary scaling
   // operations in the graphics pipeline.
   RenderWidgetHost* const rwh = tracker_->GetTargetRenderWidgetHost();
   RenderWidgetHostView* const rwhv = rwh ? rwh->GetView() : NULL;
   if (rwhv) {
     const gfx::NativeView view = rwhv->GetNativeView();
     const float scale = ui::GetScaleFactorForNativeView(view);
     if (scale > 1.0f) {
-      const gfx::Size shrunk_size(
-          gfx::ToFlooredSize(gfx::ScaleSize(optimal_size, 1.0f / scale)));
+      const gfx::Size shrunk_size =
+          gfx::ScaleToFlooredSize(optimal_size, 1.0f / scale);
       if (shrunk_size.width() > 0 && shrunk_size.height() > 0)
         optimal_size = shrunk_size;
     }
   }
 
   VLOG(1) << "Computed optimal target size: " << optimal_size.ToString();
   return optimal_size;
 }
 
 void WebContentsCaptureMachine::DidCopyFromBackingStore(
@@ skipping 131 matching lines @@
     scoped_ptr<Client> client) {
   DVLOG(1) << "Allocating " << params.requested_format.frame_size.ToString();
   core_->AllocateAndStart(params, client.Pass());
 }
 
 void WebContentsVideoCaptureDevice::StopAndDeAllocate() {
   core_->StopAndDeAllocate();
 }
 
 }  // namespace content