Add CdmFileIOProvider interface for use by cdm_adapter

media/cdm/cdm_adapter.h

Index: media/cdm/cdm_adapter.h
diff --git a/media/cdm/cdm_adapter.h b/media/cdm/cdm_adapter.h
index cb08f4a155d62ad63d7e75579be789c323f4e77d..72c7a8eb076659fbbd217ddbd002edf2191ef3e0 100644
--- a/media/cdm/cdm_adapter.h
+++ b/media/cdm/cdm_adapter.h
@@ -32,6 +32,7 @@ namespace media {
 
 class AudioFramesImpl;
 class CdmAllocator;
+class CdmFileIOProvider;
 class CdmWrapper;
 
 class MEDIA_EXPORT CdmAdapter : public MediaKeys,
@@ -42,14 +43,16 @@ class MEDIA_EXPORT CdmAdapter : public MediaKeys,
  public:
   // Create the CDM using |cdm_path| and initialize it using |key_system| and
   // |cdm_config|. |allocator| is to be used whenever the CDM needs memory
-  // and to create VideoFrames. Callbacks will be used for events generated
-  // by the CDM. |cdm_created_cb| will be called when the CDM is loaded and
-  // initialized.
+  // and to create VideoFrames. |file_io_provider| is to be used whenever the
+  // CDM needs access to the file system. Callbacks will be used for events
+  // generated by the CDM. |cdm_created_cb| will be called when the CDM is
+  // loaded and initialized.
   static void Create(
       const std::string& key_system,
       const base::FilePath& cdm_path,
       const CdmConfig& cdm_config,
       scoped_ptr<CdmAllocator> allocator,
+      scoped_ptr<CdmFileIOProvider> file_io_provider,
       const SessionMessageCB& session_message_cb,
       const SessionClosedCB& session_closed_cb,
       const LegacySessionErrorCB& legacy_session_error_cb,
@@ -149,6 +152,7 @@ class MEDIA_EXPORT CdmAdapter : public MediaKeys,
   CdmAdapter(const std::string& key_system,
              const CdmConfig& cdm_config,
              scoped_ptr<CdmAllocator> allocator,
+             scoped_ptr<CdmFileIOProvider> file_io_provider,
              const SessionMessageCB& session_message_cb,
              const SessionClosedCB& session_closed_cb,
              const LegacySessionErrorCB& legacy_session_error_cb,
@@ -210,6 +214,7 @@ class MEDIA_EXPORT CdmAdapter : public MediaKeys,
   ChannelLayout audio_channel_layout_;
 
   scoped_ptr<CdmAllocator> allocator_;
+  scoped_ptr<CdmFileIOProvider> file_io_provider_;
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;