Extract a delegate interface from c/b/input_method to permit decoupling from c/b.

chrome/browser/chromeos/input_method/mock_input_method_manager.cc

Index: chrome/browser/chromeos/input_method/mock_input_method_manager.cc
diff --git a/chrome/browser/chromeos/input_method/mock_input_method_manager.cc b/chrome/browser/chromeos/input_method/mock_input_method_manager.cc
index d7bdc87dbaf80c1694ec16c057ec21e0304bad80..7a1facd24cccd1a8cfdd8f073db49f68951135dc 100644
--- a/chrome/browser/chromeos/input_method/mock_input_method_manager.cc
+++ b/chrome/browser/chromeos/input_method/mock_input_method_manager.cc
@@ -12,7 +12,7 @@ MockInputMethodManager::MockInputMethodManager()
       remove_observer_count_(0),
       set_state_count_(0),
       last_state_(STATE_TERMINATING),
-      util_(whitelist_.GetSupportedInputMethods()) {
+      util_(&delegate_, whitelist_.GetSupportedInputMethods()) {
 }
 
 MockInputMethodManager::~MockInputMethodManager() {
@@ -143,5 +143,14 @@ InputMethodUtil* MockInputMethodManager::GetInputMethodUtil() {
   return &util_;
 }
 
+void MockInputMethodManager::set_application_locale(const std::string& value) {
+  delegate_.set_active_locale(value);
+}
+
+void MockInputMethodManager::set_hardware_keyboard_layout(
+    const std::string& value) {
+  delegate_.set_hardware_keyboard_layout(value);
+}
+
 }  // namespace input_method
 }  // namespace chromeos