[IME] Supports options page for each IME instead of single options page for each IME extension.

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 <algorithm>  // std::find
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 128 matching lines @@
 
 const std::vector<std::string>&
 InputMethodManagerImpl::GetActiveInputMethodIds() const {
   return active_input_method_ids_;
 }
 
 size_t InputMethodManagerImpl::GetNumActiveInputMethods() const {
   return active_input_method_ids_.size();
 }
 
+const InputMethodDescriptor* InputMethodManagerImpl::GetInputMethodFromId(
+    const std::string& input_method_id) const {
+  const InputMethodDescriptor* ime = util_.GetInputMethodDescriptorFromId(
+      input_method_id);
+  if (!ime) {
+    std::map<std::string, InputMethodDescriptor>::const_iterator ix =
+        extra_input_methods_.find(input_method_id);
+    if (ix != extra_input_methods_.end())
+      ime = &ix->second;
+  }
+  return ime;
+}
+
 void InputMethodManagerImpl::EnableLayouts(const std::string& language_code,
                                            const std::string& initial_layout) {
   if (state_ == STATE_TERMINATING)
     return;
 
   std::vector<std::string> candidates;
   // Add input methods associated with the language.
   util_.GetInputMethodIdsFromLanguageCode(language_code,
                                           kKeyboardLayoutsOnly,
                                           &candidates);
@@ skipping 656 matching lines @@
   if (candidate_window_controller_.get())
     return;
 
   candidate_window_controller_.reset(
       CandidateWindowController::CreateCandidateWindowController());
   candidate_window_controller_->AddObserver(this);
 }
 
 }  // namespace input_method
 }  // namespace chromeos