Change the scale factor of texture_size from the layer's one to an estimation.

content/browser/renderer_host/image_transport_factory.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/browser/renderer_host/image_transport_factory.h"
 
 #include <algorithm>
 #include <map>
 
 #include "base/bind.h"
@@ skipping 43 matching lines @@
   virtual gfx::GLSurfaceHandle CreateSharedSurfaceHandle() OVERRIDE {
     return gfx::GLSurfaceHandle();
   }
 
   virtual void DestroySharedSurfaceHandle(
       gfx::GLSurfaceHandle surface) OVERRIDE {
   }
 
   virtual scoped_refptr<ui::Texture> CreateTransportClient(
       const gfx::Size& size,
+      float device_scale_factor,
       uint64 transport_handle) OVERRIDE {
     return NULL;
   }
 
   virtual scoped_refptr<ui::Texture> CreateOwnedTexture(
       const gfx::Size& size,
+      float device_scale_factor,
       unsigned int texture_id) OVERRIDE {
     return NULL;
   }
 
   virtual GLHelper* GetGLHelper() OVERRIDE {
     return NULL;
   }
 
   virtual uint32 InsertSyncPoint() OVERRIDE {
     return 0;
@@ skipping 10 matching lines @@
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DefaultTransportFactory);
 };
 
 class ImageTransportClientTexture : public ui::Texture {
  public:
   ImageTransportClientTexture(
       WebKit::WebGraphicsContext3D* host_context,
       const gfx::Size& size,
+      float device_scale_factor,
       uint64 surface_id)
-          : ui::Texture(true, size),
+          : ui::Texture(true, size, device_scale_factor),
             host_context_(host_context) {
     set_texture_id(surface_id);
   }
 
   virtual WebKit::WebGraphicsContext3D* HostContext3D() {
     return host_context_;
   }
 
  protected:
   virtual ~ImageTransportClientTexture() {}
 
  private:
   // A raw pointer. This |ImageTransportClientTexture| will be destroyed
   // before the |host_context_| via
   // |ImageTransportFactoryObserver::OnLostContext()| handlers.
   WebKit::WebGraphicsContext3D* host_context_;
 
   DISALLOW_COPY_AND_ASSIGN(ImageTransportClientTexture);
 };
 
 class OwnedTexture : public ui::Texture, ImageTransportFactoryObserver {
  public:
   OwnedTexture(WebKit::WebGraphicsContext3D* host_context,
                const gfx::Size& size,
+               float device_scale_factor,
                unsigned int texture_id)
-      : ui::Texture(true, size),
+      : ui::Texture(true, size, device_scale_factor),
         host_context_(host_context) {
     ImageTransportFactory::GetInstance()->AddObserver(this);
     set_texture_id(texture_id);
   }
 
   // ui::Texture overrides:
   virtual WebKit::WebGraphicsContext3D* HostContext3D() OVERRIDE {
     return host_context_;
   }
 
@@ skipping 136 matching lines @@
         surface.parent_context_id != context_id)
       return;
 
     shared_context_->deleteTexture(surface.parent_texture_id[0]);
     shared_context_->deleteTexture(surface.parent_texture_id[1]);
     shared_context_->flush();
   }
 
   virtual scoped_refptr<ui::Texture> CreateTransportClient(
       const gfx::Size& size,
+      float device_scale_factor,
       uint64 transport_handle) {
     if (!shared_context_.get())
         return NULL;
     scoped_refptr<ImageTransportClientTexture> image(
         new ImageTransportClientTexture(shared_context_.get(),
-                                        size, transport_handle));
+                                        size, device_scale_factor,
+                                        transport_handle));
     return image;
   }
 
   virtual scoped_refptr<ui::Texture> CreateOwnedTexture(
       const gfx::Size& size,
+      float device_scale_factor,
       unsigned int texture_id) OVERRIDE {
     if (!shared_context_.get())
         return NULL;
     scoped_refptr<OwnedTexture> image(
-        new OwnedTexture(shared_context_.get(), size, texture_id));
+        new OwnedTexture(shared_context_.get(), size, device_scale_factor,
+                         texture_id));
     return image;
   }
 
   virtual GLHelper* GetGLHelper() {
     if (!gl_helper_.get()) {
       CreateSharedContextLazy();
       WebKit::WebGraphicsContext3D* context_for_thread =
           CreateOffscreenContext();
       if (!context_for_thread)
         return NULL;
@@ skipping 172 matching lines @@
 void ImageTransportFactory::Terminate() {
   ui::ContextFactory::SetInstance(NULL);
   delete g_factory;
   g_factory = NULL;
 }
 
 // static
 ImageTransportFactory* ImageTransportFactory::GetInstance() {
   return g_factory;
 }