Remove unused RenderPassDrawQuad fields

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 271 matching lines @@
     "quads/content_draw_quad_base.cc",
     "quads/content_draw_quad_base.h",
     "quads/debug_border_draw_quad.cc",
     "quads/debug_border_draw_quad.h",
     "quads/draw_polygon.cc",
     "quads/draw_polygon.h",
     "quads/draw_quad.cc",
     "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/shared_quad_state.cc",
     "quads/shared_quad_state.h",
     "quads/solid_color_draw_quad.cc",
     "quads/solid_color_draw_quad.h",
@@ skipping 493 matching lines @@
     "//gpu:test_support",
     "//media",
     "//skia",
     "//testing/gmock",
     "//testing/gtest",
     "//testing/perf",
     "//ui/gfx",
     "//ui/gfx/geometry",
   ]
 }