Fix PepperVideoDecoderHost to avoid crash when swithing to SW decoder.

content/renderer/pepper/pepper_video_decoder_host.h

 // Copyright (c) 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.
 
 #ifndef CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_DECODER_HOST_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_DECODER_HOST_H_
 
 #include <stdint.h>
 
 #include <list>
@@ skipping 107 matching lines @@
   // Non-owning pointer.
   RendererPpapiHost* renderer_ppapi_host_;
 
   media::VideoCodecProfile profile_;
 
   std::unique_ptr<media::VideoDecodeAccelerator> decoder_;
 
   bool software_fallback_allowed_ = false;
   bool software_fallback_used_ = false;
 
+  int pending_texture_requests_ = 0;
+
+  // Set after software decoder fallback to dismiss all outstanding texture
+  // requests.
+  int assign_textures_messages_to_dismiss_ = 0;
+
   // A vector holding our shm buffers, in sync with a similar vector in the
   // resource. We use a buffer's index in these vectors as its id on both sides
   // of the proxy. Only add buffers or update them in place so as not to
   // invalidate these ids.
   ScopedVector<base::SharedMemory> shm_buffers_;
   // A vector of true/false indicating if a shm buffer is in use by the decoder.
   // This is parallel to |shm_buffers_|.
   std::vector<uint8_t> shm_buffer_busy_;
 
   uint32_t min_picture_count_;
   typedef std::map<uint32_t, PictureBufferState> PictureBufferMap;
   PictureBufferMap picture_buffer_map_;
 
   // Keeps list of pending decodes.
   PendingDecodeList pending_decodes_;
 
   ppapi::host::ReplyMessageContext flush_reply_context_;
   ppapi::host::ReplyMessageContext reset_reply_context_;
 
   bool initialized_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(PepperVideoDecoderHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_VIDEO_DECODER_HOST_H_