Add --enable-true-color-rendering flag

ui/compositor/compositor.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 "ui/compositor/compositor.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <deque>
@@ skipping 136 matching lines @@
 
   settings.use_zero_copy = IsUIZeroCopyEnabled();
 
   if (command_line->HasSwitch(switches::kUIEnableRGBA4444Textures))
     settings.renderer_settings.preferred_tile_format = cc::RGBA_4444;
 
   settings.use_layer_lists =
       command_line->HasSwitch(cc::switches::kUIEnableLayerLists);
 
   settings.enable_color_correct_rendering =
-      command_line->HasSwitch(cc::switches::kEnableColorCorrectRendering);
+      command_line->HasSwitch(cc::switches::kEnableColorCorrectRendering) ||
+      command_line->HasSwitch(cc::switches::kEnableTrueColorRendering);
 
   // UI compositor always uses partial raster if not using zero-copy. Zero copy
   // doesn't currently support partial raster.
   settings.use_partial_raster = !settings.use_zero_copy;
 
   // Populate buffer_to_texture_target_map for all buffer usage/formats.
   for (int usage_idx = 0; usage_idx <= static_cast<int>(gfx::BufferUsage::LAST);
        ++usage_idx) {
     gfx::BufferUsage usage = static_cast<gfx::BufferUsage>(usage_idx);
     for (int format_idx = 0;
@@ skipping 358 matching lines @@
   for (auto& observer : observer_list_)
     observer.OnCompositingLockStateChanged(this);
 }
 
 void Compositor::CancelCompositorLock() {
   if (compositor_lock_)
     compositor_lock_->CancelLock();
 }
 
 }  // namespace ui