Web Locks API: Typo fix

Fix in a string logged if a renderer sends a bad message.

TBR=pwnall@chromium.org

Change-Id: I02555b07c696d4f9f9f1bdc8a39dbc4423e428e2
Reviewed-on: https://chromium-review.googlesource.com/1182602Reviewed-by: Joshua Bell <jsbell@chromium.org>
Reviewed-by: Victor Costan <pwnall@chromium.org>
Commit-Queue: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584614}

content/browser/locks/lock_manager.cc

@@ -287,7 +287,7 @@ void LockManager::RequestLock(const std::string& name,
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
 
   if (wait == WaitMode::PREEMPT && mode != LockMode::EXCLUSIVE) {
-    mojo::ReportBadMessage("Invalid option combinaton");
+    mojo::ReportBadMessage("Invalid option combination");
     return;
   }