Introduce a client minimum picture pool size

ppapi/proxy/video_decoder_resource.h

Index: ppapi/proxy/video_decoder_resource.h
diff --git a/ppapi/proxy/video_decoder_resource.h b/ppapi/proxy/video_decoder_resource.h
index aaa1b9571d4fae0d89609b193ad52e858bf912c2..bb630c4ee8a8784eb26eaaf011f0ca3e6f977fd1 100644
--- a/ppapi/proxy/video_decoder_resource.h
+++ b/ppapi/proxy/video_decoder_resource.h
@@ -48,9 +48,15 @@ class PPAPI_PROXY_EXPORT VideoDecoderResource
       PP_VideoProfile profile,
       PP_Bool allow_software_fallback,
       scoped_refptr<TrackedCallback> callback) override;
+  int32_t Initialize0_2(
+      PP_Resource graphics_context,
+      PP_VideoProfile profile,
+      PP_HardwareAcceleration acceleration,
+      scoped_refptr<TrackedCallback> callback) override;
   int32_t Initialize(PP_Resource graphics_context,
                      PP_VideoProfile profile,
                      PP_HardwareAcceleration acceleration,
+                     uint32_t min_picture_count,
                      scoped_refptr<TrackedCallback> callback) override;
   int32_t Decode(uint32_t decode_id,
                  uint32_t size,
@@ -168,6 +174,8 @@ class PPAPI_PROXY_EXPORT VideoDecoderResource
   static const int kMaximumPictureDelay = 128;
   uint32_t decode_ids_[kMaximumPictureDelay];
 
+  uint32_t min_picture_count_;
+
   // State for pending get_picture_callback_.
   PP_VideoPicture* get_picture_;
   PP_VideoPicture_0_1* get_picture_0_1_;