cc: Make RenderPass into a struct-like class.

cc/render_surface_unittest.cc

 // Copyright 2011 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/render_surface_impl.h"
 
 #include "cc/append_quads_data.h"
 #include "cc/layer_impl.h"
 #include "cc/render_pass_sink.h"
 #include "cc/scoped_ptr_vector.h"
@@ skipping 127 matching lines @@
     renderSurface->setScreenSpaceTransform(origin);
     renderSurface->setContentRect(contentRect);
 
     TestRenderPassSink passSink;
 
     renderSurface->appendRenderPasses(passSink);
 
     ASSERT_EQ(1u, passSink.renderPasses().size());
     RenderPass* pass = passSink.renderPasses()[0];
 
-    EXPECT_EQ(RenderPass::Id(2, 0), pass->id());
-    EXPECT_RECT_EQ(contentRect, pass->outputRect());
-    EXPECT_EQ(origin, pass->transformToRootTarget());
+    EXPECT_EQ(RenderPass::Id(2, 0), pass->id);
+    EXPECT_RECT_EQ(contentRect, pass->output_rect);
+    EXPECT_EQ(origin, pass->transform_to_root_target);
 }
 
 }  // namespace
 }  // namespace cc