Updates google-input-tools.

third_party/google_input_tools/src/chrome/os/inputview/util.js

 // Copyright 2014 The ChromeOS IME Authors. All Rights Reserved.
 // limitations under the License.
 // See the License for the specific language governing permissions and
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // distributed under the License is distributed on an "AS-IS" BASIS,
 // Unless required by applicable law or agreed to in writing, software
 //
 //      http://www.apache.org/licenses/LICENSE-2.0
 //
 // You may obtain a copy of the License at
@@ skipping 264 matching lines @@
 };
 
 
 /**
  * Whether this is a letter key.
  *
  * @param {!Array.<string>} characters The characters.
  * @return {boolean} True if this is a letter key.
  */
 util.isLetterKey = function(characters) {
+  if (characters[0] == characters[1]) {
+    return false;
+  }
+
   if (characters[1] == util.toUpper(
       characters[0]) || characters[1] == util.
           toLower(characters[0])) {
     return true;
   }
   return false;
 };
 
 
 /**
@@ skipping 86 matching lines @@
  * @param {string} oldContext The old context.
  * @param {string} newContext The new context.
  *
  * @return {boolean} Whether the transform is valid.
  */
 util.isLetterRestore = function(oldContext, newContext) {
   return util.isLetterDelete(newContext, oldContext);
 };
 
 });  // goog.scope