Make RenderPass::Id an isolated class

cc/BUILD.gn

 # Copyright 2014 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.
 
 component("cc") {
   sources = [
     "animation/animation.cc",
     "animation/animation.h",
     "animation/animation_curve.cc",
     "animation/animation_curve.h",
@@ skipping 278 matching lines @@
     "quads/draw_quad.h",
     "quads/io_surface_draw_quad.cc",
     "quads/io_surface_draw_quad.h",
     "quads/largest_draw_quad.h",
     "quads/picture_draw_quad.cc",
     "quads/picture_draw_quad.h",
     "quads/render_pass.cc",
     "quads/render_pass.h",
     "quads/render_pass_draw_quad.cc",
     "quads/render_pass_draw_quad.h",
+    "quads/render_pass_id.cc",
+    "quads/render_pass_id.h",
     "quads/shared_quad_state.cc",
     "quads/shared_quad_state.h",
     "quads/solid_color_draw_quad.cc",
     "quads/solid_color_draw_quad.h",
     "quads/stream_video_draw_quad.cc",
     "quads/stream_video_draw_quad.h",
     "quads/surface_draw_quad.cc",
     "quads/surface_draw_quad.h",
     "quads/texture_draw_quad.cc",
     "quads/texture_draw_quad.h",
@@ skipping 488 matching lines @@
     "//gpu/command_buffer/common:gles2_utils",
     "//media",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//testing/perf",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 }