Introduce a client minimum picture pool size

content/common/gpu/media/gpu_video_decode_accelerator.cc

Index: content/common/gpu/media/gpu_video_decode_accelerator.cc
diff --git a/content/common/gpu/media/gpu_video_decode_accelerator.cc b/content/common/gpu/media/gpu_video_decode_accelerator.cc
index 99a782f54c48f52572501ed188d78fba34a0b788..b7743ecb329e639897c35bc8ece4f85a19b33387 100644
--- a/content/common/gpu/media/gpu_video_decode_accelerator.cc
+++ b/content/common/gpu/media/gpu_video_decode_accelerator.cc
@@ -234,6 +234,7 @@ void GpuVideoDecodeAccelerator::NotifyError(
 
 void GpuVideoDecodeAccelerator::Initialize(
     const media::VideoCodecProfile profile,
+    uint32 min_picture_count,
     IPC::Message* init_done_msg) {
   DCHECK(!video_decode_accelerator_.get());
 
@@ -266,7 +267,8 @@ void GpuVideoDecodeAccelerator::Initialize(
   for (const auto& create_vda_function : create_vda_fps) {
     video_decode_accelerator_ = (this->*create_vda_function)();
     if (!video_decode_accelerator_ ||
-        !video_decode_accelerator_->Initialize(profile, this))
+        !video_decode_accelerator_->Initialize(
+            profile, min_picture_count, this))
       continue;
 
     if (video_decode_accelerator_->CanDecodeOnIOThread()) {