Override keyset with the IME layout info.

chrome/browser/chromeos/input_method/input_method_manager_impl.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/chromeos/input_method/input_method_manager_impl.h"
 
 #include <stdint.h>
 
 #include <algorithm>  // std::find
 #include <memory>
@@ skipping 1210 matching lines @@
   // not system IME, and we don't support show emoji, handwriting or voice
   // input for such IME extension.
   if (!url.has_ref())
     return;
   std::string overridden_ref = url.ref();
   auto i = overridden_ref.find("id");
   if (i == std::string::npos)
     return;
 
   if (keyset.empty()) {
+    // Resets the url as the input method default url and notify the hash
+    // changed to VK.
     keyboard::SetOverrideContentUrl(
         GetActiveIMEState()->GetCurrentInputMethod().input_view_url());
+    keyboard::KeyboardController* keyboard_controller =
+        keyboard::KeyboardController::GetInstance();
+    if (keyboard_controller)
+      keyboard_controller->Reload();
     return;
   }
 
   // For system IME extension, the input view url is overridden as:
   // chrome-extension://${extension_id}/inputview.html#id=us.compact.qwerty
   // &language=en-US&passwordLayout=us.compact.qwerty&name=keyboard_us
-  // Fow emoji and handwriting input, we replace the id=${keyset} part with
-  // desired keyset like: id=emoji; For voice, we append ".voice" to the end of
-  // id like: id=${keyset}.voice.
+  // Fow emoji, handwriting and voice input, we append the keyset to the end of
+  // id like: id=${keyset}.emoji/hwt/voice.
   auto j = overridden_ref.find("&", i + 1);
-  if (keyset == "voice") {
-    overridden_ref.replace(j, 0, "." + keyset);
-  } else {
-    overridden_ref.replace(i, j - i, "id=" + keyset);
-  }
+  overridden_ref.replace(j, 0, "." + keyset);

[Shu Chen, 2016/10/24 01:30:47]

To reduce the risk of potential breakage, can you please make safer replacement?
e.g. find the "id=" and then find the "&" or EOS after it.

[Azure Wei, 2016/10/24 08:11:09]

Done.

 
   GURL::Replacements replacements;
   replacements.SetRefStr(overridden_ref);
   keyboard::SetOverrideContentUrl(url.ReplaceComponents(replacements));
 }
 
 bool InputMethodManagerImpl::IsEmojiHandwritingVoiceOnImeMenuEnabled() {
   return base::FeatureList::IsEnabled(features::kEHVInputOnImeMenu);
 }
 
 }  // namespace input_method
 }  // namespace chromeos