Don't force clearing of textures that the HW decoder will overwrite.

content/common/gpu/media/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 "content/common/gpu/media/gpu_video_decode_accelerator.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 207 matching lines @@
 
   std::vector<media::PictureBuffer> buffers;
   for (uint32 i = 0; i < buffer_ids.size(); ++i) {
     gpu::gles2::TextureManager::TextureInfo* info =
         texture_manager->GetTextureInfo(texture_ids[i]);
     if (!info) {
       DLOG(FATAL) << "Failed to find texture id " << texture_ids[i];
       NotifyError(media::VideoDecodeAccelerator::INVALID_ARGUMENT);
       return;
     }
-    if (!texture_manager->ClearRenderableLevels(command_decoder, info)) {
-      DLOG(FATAL) << "Failed to Clear texture id " << texture_ids[i];
-      NotifyError(media::VideoDecodeAccelerator::PLATFORM_FAILURE);
-      return;
-    }
+    texture_manager->SetLevelCleared(info, GL_TEXTURE_2D, 0);

[Ami GONE FROM CHROMIUM, 2012/12/11 17:20:01]

The texture target may not be GL_TEXTURE_2D (see ProvidePictureBuffers for
example).

     uint32 service_texture_id;
     if (!command_decoder->GetServiceTextureId(
             texture_ids[i], &service_texture_id)) {
       DLOG(FATAL) << "Failed to translate texture!";
       NotifyError(media::VideoDecodeAccelerator::PLATFORM_FAILURE);
       return;
     }
     buffers.push_back(media::PictureBuffer(
         buffer_ids[i], sizes[i], service_texture_id));
   }
@@ skipping 58 matching lines @@
     stub_.reset();
   }
 }
 
 bool GpuVideoDecodeAccelerator::Send(IPC::Message* message) {
   DCHECK(sender_);
   return sender_->Send(message);
 }
 
 }  // namespace content