Rename cc::ResourceProvider::ResourceId to cc::ResourceId and move it to its own file.

cc/layers/painted_scrollbar_layer_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 "cc/layers/painted_scrollbar_layer_impl.h"
 
 #include <algorithm>
 
 #include "cc/animation/scrollbar_animation_controller.h"
 #include "cc/layers/layer.h"
@@ skipping 77 matching lines @@
 
   gfx::Rect thumb_quad_rect = ComputeThumbQuadRect();
   gfx::Rect scaled_thumb_quad_rect =
       gfx::ScaleToEnclosingRect(thumb_quad_rect, internal_contents_scale_);
   gfx::Rect visible_thumb_quad_rect =
       draw_properties().occlusion_in_content_space.GetUnoccludedContentRect(
           thumb_quad_rect);
   gfx::Rect scaled_visible_thumb_quad_rect = gfx::ScaleToEnclosingRect(
       visible_thumb_quad_rect, internal_contents_scale_);
 
-  ResourceProvider::ResourceId thumb_resource_id =
+  ResourceId thumb_resource_id =
       layer_tree_impl()->ResourceIdForUIResource(thumb_ui_resource_id_);
-  ResourceProvider::ResourceId track_resource_id =
+  ResourceId track_resource_id =
       layer_tree_impl()->ResourceIdForUIResource(track_ui_resource_id_);
 
   if (thumb_resource_id && !visible_thumb_quad_rect.IsEmpty()) {
     gfx::Rect opaque_rect;
     const float opacity[] = {1.0f, 1.0f, 1.0f, 1.0f};
     TextureDrawQuad* quad =
         render_pass->CreateAndAppendDrawQuad<TextureDrawQuad>();
     quad->SetNew(shared_quad_state, scaled_thumb_quad_rect, opaque_rect,
                  scaled_visible_thumb_quad_rect, thumb_resource_id,
                  premultipled_alpha, uv_top_left, uv_bottom_right,
@@ skipping 72 matching lines @@
 
 bool PaintedScrollbarLayerImpl::IsThumbResizable() const {
   return false;
 }
 
 const char* PaintedScrollbarLayerImpl::LayerTypeAsString() const {
   return "cc::PaintedScrollbarLayerImpl";
 }
 
 }  // namespace cc