Part 1/3 (compositor) of adding with device scale factor to transport surfaces

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.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.
 
 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 
 #include "third_party/khronos/GLES2/gl2.h"
 #ifndef GL_GLEXT_PROTOTYPES
 #define GL_GLEXT_PROTOTYPES 1
 #endif
@@ skipping 549 matching lines @@
   // (see above).
   if (ShouldUseSwapClient())
     swap_client_->OnViewContextSwapBuffersPosted();
   gl_->PostSubBufferCHROMIUM(x, y, width, height);
   command_buffer_->Echo(base::Bind(
       &WebGraphicsContext3DCommandBufferImpl::OnSwapBuffersComplete,
       weak_ptr_factory_.GetWeakPtr()));
 }
 
 void WebGraphicsContext3DCommandBufferImpl::reshape(int width, int height) {
+  reshapeWithScaleFactor(width, height, 1.f);
+}
+
+void WebGraphicsContext3DCommandBufferImpl::reshapeWithScaleFactor(
+    int width, int height, float scale_factor) {
   cached_width_ = width;
   cached_height_ = height;
 
   gl_->ResizeCHROMIUM(width, height);
 }
 
 void WebGraphicsContext3DCommandBufferImpl::FlipVertically(
     uint8* framebuffer,
     unsigned int width,
     unsigned int height) {
@@ skipping 1154 matching lines @@
 
 void WebGraphicsContext3DCommandBufferImpl::OnErrorMessage(
     const std::string& message, int id) {
   if (error_message_callback_) {
     WebKit::WebString str = WebKit::WebString::fromUTF8(message.c_str());
     error_message_callback_->onErrorMessage(str, id);
   }
 }
 
 }  // namespace content