Enforce no uncleared OES external textures. Clear in AVDA, not GVD.

media/gpu/ipc/service/gpu_video_decode_accelerator.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 "media/gpu/ipc/service/gpu_video_decode_accelerator.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 501 matching lines @@
   DCHECK(child_task_runner_->BelongsToCurrentThread());
   DebugAutoLock auto_lock(debug_uncleared_textures_lock_);
   auto it = uncleared_textures_.find(picture.picture_buffer_id());
   if (it == uncleared_textures_.end())
     return;  // the texture has been cleared
 
   for (auto texture_ref : it->second) {
     GLenum target = texture_ref->texture()->target();
     gpu::gles2::TextureManager* texture_manager =
         stub_->decoder()->GetContextGroup()->texture_manager();
-    DCHECK(!texture_ref->texture()->IsLevelCleared(target, 0));
-    texture_manager->SetLevelCleared(texture_ref.get(), target, 0, true);
+
+    // External textures are a special case and expected to already be cleared.
+    if (target == GL_TEXTURE_EXTERNAL_OES) {
+      DCHECK(texture_ref->texture()->IsLevelCleared(target, 0));
+    } else {
+      DCHECK(!texture_ref->texture()->IsLevelCleared(target, 0));
+      texture_manager->SetLevelCleared(texture_ref.get(), target, 0, true);
+    }
   }
   uncleared_textures_.erase(it);
 }
 
 }  // namespace media