[#5] Pass gfx structs by const ref (gfx::Vector2dF)

content/browser/android/in_process/synchronous_compositor_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 "content/browser/android/in_process/synchronous_compositor_impl.h"
 
 #include "base/lazy_instance.h"
 #include "base/message_loop/message_loop.h"
 #include "cc/input/input_handler.h"
 #include "cc/input/layer_scroll_offset_delegate.h"
@@ skipping 194 matching lines @@
   if (rwhv)
     rwhv->SynchronousFrameMetadata(frame_metadata);
 }
 
 void SynchronousCompositorImpl::DidActivatePendingTree() {
   if (compositor_client_)
     compositor_client_->DidUpdateContent();
 }
 
 void SynchronousCompositorImpl::SetMaxScrollOffset(
-    gfx::Vector2dF max_scroll_offset) {
+    const gfx::Vector2dF& max_scroll_offset) {
   DCHECK(CalledOnValidThread());
   if (compositor_client_)
     compositor_client_->SetMaxRootLayerScrollOffset(max_scroll_offset);
 }
 
-void SynchronousCompositorImpl::SetTotalScrollOffset(gfx::Vector2dF new_value) {
+void SynchronousCompositorImpl::SetTotalScrollOffset(
+    const gfx::Vector2dF& new_value) {
   DCHECK(CalledOnValidThread());
   if (compositor_client_)
     compositor_client_->SetTotalRootLayerScrollOffset(new_value);
 }
 
 gfx::Vector2dF SynchronousCompositorImpl::GetTotalScrollOffset() {
   DCHECK(CalledOnValidThread());
   if (compositor_client_)
     return compositor_client_->GetTotalRootLayerScrollOffset();
   return gfx::Vector2dF();
@@ skipping 35 matching lines @@
     g_factory.Get();  // Ensure it's initialized.
     SynchronousCompositorImpl::CreateForWebContents(contents);
   }
   if (SynchronousCompositorImpl* instance =
       SynchronousCompositorImpl::FromWebContents(contents)) {
     instance->SetClient(client);
   }
 }
 
 }  // namespace content