Implement CopyFileFromLocal of MTPDeviceAsyncDelegate.

chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h

Index: chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h
diff --git a/chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h b/chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h
index f73c3f77bea5611fb0b418292f46899dcd37ab65..45416107f50baa809ec27eac6d13e5e573d97287 100644
--- a/chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h
+++ b/chrome/browser/media_galleries/fileapi/mtp_device_async_delegate.h
@@ -63,6 +63,9 @@ class MTPDeviceAsyncDelegate {
     ErrorCallback error_callback;
   };
 
+  // A callback to be called when CopyFileFromLocal method call succeeds.
+  typedef base::Callback<void()> CopyFileFromLocalSuccessCallback;

[Lei Zhang, 2015/02/24 23:35:48]

Isn't base::Callback<void()> just base::Closure, like elsewhere?

[yawano, 2015/02/26 07:27:54]

Done.

+
   // Gets information about the given |file_path| and invokes the appropriate
   // callback asynchronously when complete.
   virtual void GetFileInfo(
@@ -99,6 +102,13 @@ class MTPDeviceAsyncDelegate {
                          const ReadBytesSuccessCallback& success_callback,
                          const ErrorCallback& error_callback) = 0;
 
+  // Copies a file from |source_file_path| to |device_file_path|.
+  virtual void CopyFileFromLocal(
+      const base::FilePath& source_file_path,
+      const base::FilePath& device_file_path,
+      const CopyFileFromLocalSuccessCallback& success_callback,
+      const ErrorCallback& error_callback) = 0;
+
   // Called when the
   // (1) Browser application is in shutdown mode (or)
   // (2) Last extension using this MTP device is destroyed (or)