Capitalize SMB in comments in smb_file_system.h

Correctly capitalize smb->SMB in smb_file_system.h comments.

Bug: chromium:757625
Change-Id: I8d708c2ef8a29bc9f752fe50177b0a726191b974
Reviewed-on: https://chromium-review.googlesource.com/1144130Reviewed-by: Zentaro Kavanagh <zentaro@chromium.org>
Commit-Queue: jimmy gong <jimmyxgong@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577014}

chrome/browser/chromeos/smb_client/smb_file_system.h

@@ -39,10 +39,10 @@ namespace smb_client {
 
 class RequestManager;
 
-// Smb provided file system implementation. For communication with Smb
+// SMB provided file system implementation. For communication with SMB
 // filesystems.
-// Smb is an application level protocol used by Windows and Samba fileservers.
-// Allows Files App to mount smb filesystems.
+// SMB is an application level protocol used by Windows and Samba fileservers.
+// Allows Files App to mount SMB filesystems.
 class SmbFileSystem : public file_system_provider::ProvidedFileSystemInterface,
                       public base::SupportsWeakPtr<SmbFileSystem> {
  public: