Introduce a client minimum picture pool size

content/common/gpu/media/video_decode_accelerator_unittest.cc

Index: content/common/gpu/media/video_decode_accelerator_unittest.cc
diff --git a/content/common/gpu/media/video_decode_accelerator_unittest.cc b/content/common/gpu/media/video_decode_accelerator_unittest.cc
index 0605fb04aeccc612b14c893bf1daa245f6ff2ba6..8d5ebd36eb921bc91c0567ca30bdd2dc848d09d0 100644
--- a/content/common/gpu/media/video_decode_accelerator_unittest.cc
+++ b/content/common/gpu/media/video_decode_accelerator_unittest.cc
@@ -143,6 +143,9 @@ const int kMaxFramesToDelayReuse = 64;
 const base::TimeDelta kReuseDelay = base::TimeDelta::FromSeconds(1);
 // Simulate WebRTC and call VDA::Decode 30 times per second.
 const int kWebRtcDecodeCallsPerSecond = 30;
+// Simulate an adjustment to a larger number of pictures to make sure the
+// decoder supports an upwards adjustment.
+const int kExtraPictureBuffers = 2;
 
 struct TestVideoFile {
   explicit TestVideoFile(base::FilePath::StringType file_name)
@@ -615,6 +618,8 @@ void GLRenderingVDAClient::ProvidePictureBuffers(
     return;
   std::vector<media::PictureBuffer> buffers;
 
+  requested_num_of_buffers += kExtraPictureBuffers;
+
   texture_target_ = texture_target;
   for (uint32 i = 0; i < requested_num_of_buffers; ++i) {
     uint32 texture_id;