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 e6b56b9efba857e0ed9d32986a87bad0ba9e58f9..ee41fb919e86a31470906d2e85244c9cc24508fe 100644
--- a/chrome/browser/chromeos/drive/file_system_util.h
+++ b/chrome/browser/chromeos/drive/file_system_util.h
@@ -62,6 +62,10 @@ 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 <username_hash>

[bartfab (slow), 2014/03/13 13:20:00]

Nit 1: Add comma before "when".
Nit 2: Add full stop at the end.
Nit 3: Surround symbols in comments with ||, not with <>.
Nit 4: Specifying the format of the mount path in the comment makes no sense to
me. The whole point of this function is to hide this detail from anyone wishing
to access Drive.

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

[bartfab (slow), 2014/03/13 13:20:00]

Nit 1: After an unfortunate proliferation of many different names for the same
thing, we eventually settled on |user_id|. Thus, s/username_hash/user_id_hash/.
Nit 2: Make the argument a const reference.
Nit 3: How about a method name like GetDriveMountPointForUser() instead?

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