Improve GL shader YUV adjustment.

cc/ipc/quads_struct_traits.cc

 // Copyright 2016 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/ipc/quads_struct_traits.h"
 #include "ui/gfx/mojo/transform_struct_traits.h"
 
 namespace mojo {
 
 cc::DrawQuad* AllocateAndConstruct(cc::mojom::Material material,
@@ skipping 280 matching lines @@
       data.a_plane_resource_id();
   static_assert(cc::YUVVideoDrawQuad::kAPlaneResourceIdIndex ==
                     cc::DrawQuad::Resources::kMaxResourceIdCount - 1,
                 "The A plane resource should be the last resource ID.");
   quad->resources.count = data.a_plane_resource_id() ? 4 : 3;
 
   if (!data.ReadColorSpace(&quad->color_space))
     return false;
   quad->resource_offset = data.resource_offset();
   quad->resource_multiplier = data.resource_multiplier();
+  quad->bits_per_channel = data.bits_per_channel();
+  if (quad->bits_per_channel < cc::YUVVideoDrawQuad::kMinBitsPerChannel ||
+      quad->bits_per_channel > cc::YUVVideoDrawQuad::kMaxBitsPerChannel) {
+    return false;
+  }
   return true;
 }
 
 // static
 bool StructTraits<cc::mojom::DrawQuad, cc::DrawQuad>::Read(
     cc::mojom::DrawQuadDataView data,
     cc::DrawQuad* out) {
   if (!ReadDrawQuad(data, out))
     return false;
   switch (data.material()) {
@@ skipping 18 matching lines @@
     case cc::mojom::Material::TILED_CONTENT:
       return data.ReadTileQuadState(out);
     case cc::mojom::Material::YUV_VIDEO_CONTENT:
       return data.ReadYuvVideoQuadState(out);
   }
   NOTREACHED();
   return false;
 }
 
 }  // namespace mojo