Remove all code for chrome.experimental.speechInput extension API

chrome/test/data/extensions/api_test/speech_input/recognition/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 testSpeechInputRecognition() {
-    var did_sound_start = false;
-    var did_sound_end = false;
-
-    // Check that sound starts once and before ending.
-    chrome.experimental.speechInput.onSoundStart.addListener(function() {
-      chrome.test.assertFalse(did_sound_start);
-      chrome.test.assertFalse(did_sound_end);
-      did_sound_start = true;
-    });
-
-    // Check that sounds ends once and after starting.
-    chrome.experimental.speechInput.onSoundEnd.addListener(function() {
-      chrome.test.assertTrue(did_sound_start);
-      chrome.test.assertFalse(did_sound_end);
-      did_end_sound = true;
-    });
-
-    // Check that both sound events happened and that the given results
-    // match the expected ones.
-    chrome.experimental.speechInput.onResult.addListener(function(event) {
-      chrome.test.assertTrue(did_sound_start);
-      chrome.test.assertTrue(did_end_sound);
-      chrome.test.assertEq(event.hypotheses.length, 1);
-      chrome.test.assertEq(event.hypotheses[0].utterance, "this is a test");
-      chrome.test.assertEq(event.hypotheses[0].confidence, 0.99);
-
-      // Ensure no recording is happening after delivering results.
-      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();
-        });
-      });
-    });
-
-    // Ensure that no errors happened during the recognition.
-    chrome.experimental.speechInput.onError.addListener(function(event) {
-      chrome.test.fail();
-    });
-
-    // Recording is not active, start it.
-    chrome.experimental.speechInput.isRecording(function(recording) {
-      chrome.test.assertNoLastError();
-      chrome.test.assertFalse(recording);
-      chrome.experimental.speechInput.start({}, function() {
-        chrome.test.assertNoLastError();
-      });
-    });
-  }
-]);