Remove all code for chrome.experimental.speechInput extension API

chrome/test/data/extensions/api_test/speech_input/recognition_error/test.js

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Extension Speech Input api test.
-// browser_tests --gtest_filter="ExtensionSpeechInputApiTest.*"
-
-chrome.test.runTests([
-  function testSpeechInputRecognitionError() {
-    // Results should never be provided in this test case.
-    chrome.experimental.speechInput.onResult.addListener(function(event) {
-      chrome.test.fail();
-    });
-
-    // Ensure the recognition error happens.
-    chrome.experimental.speechInput.onError.addListener(function(error) {
-      chrome.test.assertEq(error.code, "networkError");
-
-      // No recording should be happening after an error.
-      chrome.experimental.speechInput.isRecording(function(recording) {
-        chrome.test.assertNoLastError();
-        chrome.test.assertFalse(recording);
-
-        // Stopping should fail since we're in the idle state again.
-        chrome.experimental.speechInput.stop(function() {
-          chrome.test.assertEq(chrome.runtime.lastError.message,
-              "invalidOperation");
-          chrome.test.succeed();
-        });
-      });
-    });
-
-    // Start recording.
-    chrome.experimental.speechInput.start({}, function() {
-      chrome.test.assertNoLastError();
-    });
-  }
-]);