[ios] Adds ChromiumBrowserProvider.

ios/chrome/browser/providers/chromium_voice_search_provider.mm

Index: ios/chrome/browser/providers/chromium_voice_search_provider.mm
diff --git a/ios/chrome/browser/providers/chromium_voice_search_provider.mm b/ios/chrome/browser/providers/chromium_voice_search_provider.mm
new file mode 100644
index 0000000000000000000000000000000000000000..d35449b3645db3ae611c05249a6b5dbf36487a62
--- /dev/null
+++ b/ios/chrome/browser/providers/chromium_voice_search_provider.mm
@@ -0,0 +1,17 @@
+// Copyright 2016 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.
+
+#import "ios/chrome/browser/providers/chromium_voice_search_provider.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+ChromiumVoiceSearchProvider::ChromiumVoiceSearchProvider() {}
+
+ChromiumVoiceSearchProvider::~ChromiumVoiceSearchProvider() {}
+
+bool ChromiumVoiceSearchProvider::IsVoiceSearchEnabled() const {
+  return false;
+}