Make RenderPass::Id an isolated class

ui/compositor/layer_unittest.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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/debug/trace_event.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 1324 matching lines @@
   child->SetBounds(gfx::Rect(200, 200, 400, 400));
   child->SetVisible(true);
   DrawTree(root.get());
   EXPECT_TRUE(delegate.painted());
 }
 
 static scoped_ptr<cc::DelegatedFrameData> MakeFrameData(gfx::Size size) {
   scoped_ptr<cc::DelegatedFrameData> frame_data(new cc::DelegatedFrameData);
   scoped_ptr<cc::RenderPass> render_pass(cc::RenderPass::Create());
   render_pass->SetNew(
-      cc::RenderPass::Id(1, 1), gfx::Rect(size), gfx::Rect(), gfx::Transform());
+      cc::RenderPassId(1, 1), gfx::Rect(size), gfx::Rect(), gfx::Transform());
   frame_data->render_pass_list.push_back(render_pass.Pass());
   return frame_data.Pass();
 }
 
 TEST_F(LayerWithDelegateTest, DelegatedLayer) {
   scoped_ptr<Layer> root(CreateNoTextureLayer(gfx::Rect(0, 0, 1000, 1000)));
 
   scoped_ptr<Layer> child(CreateLayer(LAYER_TEXTURED));
 
   child->SetBounds(gfx::Rect(0, 0, 10, 10));
@@ skipping 229 matching lines @@
 
   c11->SetBounds(gfx::Rect(2, 2, 10, 10));
   SnapLayerToPhysicalPixelBoundary(root.get(), c11.get());
   // c11 is now off the pixel.
   // 0.5 / 1.5 = 0.333...
   EXPECT_EQ("0.33 0.33",
             Vector2dFTo100thPercisionString(c11->subpixel_position_offset()));
 }
 
 }  // namespace ui