Fix typo in ThumbnailCache.

Change-Id: Ie3062d15c52cc7c7ddc4a293f53f22c9ec47a8fc
Reviewed-on: https://chromium-review.googlesource.com/1243409Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Aaron Colwell <acolwell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594426}

chrome/browser/android/thumbnail/thumbnail_cache.cc

@@ -435,8 +435,8 @@ void ThumbnailCache::MakeSpaceForNewItemIfNecessary(TabId tab_id) {
          riter++) {
       if (cache_.Get(*riter)) {
         key_to_remove = *riter;
-        break;
         found_key_to_remove = true;
+        break;
       }
     }
   }