Libcros version-up for preedit text monitoring on ChromeOS.

chrome/browser/chromeos/input_method/candidate_window.cc

Index: chrome/browser/chromeos/input_method/candidate_window.cc
diff --git a/chrome/browser/chromeos/input_method/candidate_window.cc b/chrome/browser/chromeos/input_method/candidate_window.cc
index 20b4ce17ff11f24342314ee675e0687152959728..77a77ce05c279cd79ff69860f5dde582e51992ce 100644
--- a/chrome/browser/chromeos/input_method/candidate_window.cc
+++ b/chrome/browser/chromeos/input_method/candidate_window.cc
@@ -585,6 +585,16 @@ class CandidateWindowController::Impl : public CandidateWindowView::Observer {
   static void OnUpdateLookupTable(void* input_method_library,
                                   const InputMethodLookupTable& lookup_table);
 
+  // The function is called when |UpdatePreeditText| signal is received
+  // in libcros. |input_method_library| is a void pointer to this object.
+  static void OnUpdatePreeditText(void* input_method_library,
+                                  const std::string& utf8_text,
+                                  unsigned int cursor, bool visible);
+
+  // The function is called when |HidePreeditText| signal is received
+  // in libcros. |input_method_library| is a void pointer to this object.
+  static void OnHidePreeditText(void* input_method_library);
+
   // This function is called by libcros when ibus connects or disconnects.
   // |input_method_library| is a void pointer to this object.
   static void OnConnectionChange(void* input_method_library, bool connected);
@@ -1247,6 +1257,10 @@ bool CandidateWindowController::Impl::Init() {
   MonitorInputMethodConnection(
       ui_status_connection_,
       &CandidateWindowController::Impl::OnConnectionChange);
+  MonitorInputMethodPreeditText(
+      ui_status_connection_,
+      &CandidateWindowController::Impl::OnHidePreeditText,
+      &CandidateWindowController::Impl::OnUpdatePreeditText);
 
   // Create the candidate window view.
   CreateView();
@@ -1296,6 +1310,10 @@ void CandidateWindowController::Impl::OnHideLookupTable(
   controller->candidate_window_->HideLookupTable();
 }
 
+void CandidateWindowController::Impl::OnHidePreeditText(
+    void* input_method_library) {
+}
+
 void CandidateWindowController::Impl::OnSetCursorLocation(
     void* input_method_library,
     int x,
@@ -1356,6 +1374,11 @@ void CandidateWindowController::Impl::OnUpdateLookupTable(
   controller->frame_->Show();
 }
 
+void CandidateWindowController::Impl::OnUpdatePreeditText(
+    void* input_method_library,
+    const std::string& utf8_text, unsigned int cursor, bool visible) {
+}
+
 void CandidateWindowController::Impl::OnCandidateCommitted(int index,
                                                            int button,
                                                            int flags) {