Introduce a client minimum picture pool size

ppapi/proxy/video_decoder_constants.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 PPAPI_PROXY_VIDEO_DECODER_CONSTANTS_H_
 #define PPAPI_PROXY_VIDEO_DECODER_CONSTANTS_H_
 
 namespace ppapi {
 namespace proxy {
 
 // These constants are shared by the video decoder resource and host.
 enum {
   // Maximum number of concurrent decodes which can be pending.
   kMaximumPendingDecodes = 8,
 
   // Minimum size of shared-memory buffers (100 KB). Make them large since we
   // try to reuse them.
   kMinimumBitstreamBufferSize = 100 << 10,
 
   // Maximum size of shared-memory buffers (4 MB). This should be enough even
   // for 4K video at reasonable compression levels.
-  kMaximumBitstreamBufferSize = 4 << 20
+  kMaximumBitstreamBufferSize = 4 << 20,
+
+  // The maximum number of pictures that the client can pass in for
+  // min_picture_count, just as a sanity check on the argument.
+  // This should match the constant of the same name in test_video_decoder.cc.
+  kMaximumPictureCount = 100
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_VIDEO_DECODER_CONSTANTS_H_