media: recycle buffers/direct rendering etc. (third patch)

media/base/limits.h

Index: media/base/limits.h
diff --git a/media/base/limits.h b/media/base/limits.h
index 517a5d10bbd466cf1c47e818b47047bd32f03a76..b8a139f385535607336640cc66133e54fd5cb9d2 100644
--- a/media/base/limits.h
+++ b/media/base/limits.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -16,6 +16,9 @@ struct Limits {
   static const size_t kMaxDimension = (1 << 15) - 1;  // 32767
   static const size_t kMaxCanvas = (1 << (14 * 2));  // 16384 x 16384
 
+  // Total number of video frames which are populating in the pipeline.
+  static const size_t kMaxVideoFrames = 4;
+
   // Following limits are used by AudioParameters::IsValid().
   // The 192 Khz constant is the frequency of quicktime lossless audio codec.
   // MP4 is limited to 96 Khz, and mp3 is limited to 48 Khz.