Set drive as the default download folder

chrome/browser/chromeos/drive/file_system_util.h

Index: chrome/browser/chromeos/drive/file_system_util.h
diff --git a/chrome/browser/chromeos/drive/file_system_util.h b/chrome/browser/chromeos/drive/file_system_util.h
index 43ae4c51b09f87763f0c36657a3883764d468a87..d60714ef5c9ab216e8f6d1055f86b8d42593cdcb 100644
--- a/chrome/browser/chromeos/drive/file_system_util.h
+++ b/chrome/browser/chromeos/drive/file_system_util.h
@@ -59,6 +59,10 @@ const base::FilePath& GetDriveMyDriveRootPath();
 // Returns the Drive mount point path, which looks like "/special/drive-<hash>".
 base::FilePath GetDriveMountPointPath(Profile* profile);
 
+// Returns the Drive mount point path, which looks like
+// "/special/drive-<username_hash>", when provided with the |userid_hash|.

[bartfab (slow), 2014/03/14 13:43:45]

Nit: s/userid/user_id/

+base::FilePath GetDriveMountPointPathUsingUserHash(std::string userid_hash);

[bartfab (slow), 2014/03/14 13:43:45]

Nit 1: s/userid/user_id/
Nit 2: How about s/UsingUserHash/ForUser/? It better describes what you are
trying to get - a particular user's mount point path. The fact that this is
derived from the user's ID hash is secondary.

+
 // Returns the FileSystem for the |profile|. If not available (not mounted
 // or disabled), returns NULL.
 FileSystemInterface* GetFileSystemByProfile(Profile* profile);