Show composition text on IME panel when Pepper plugin is focused (Linux).

chrome/browser/renderer_host/gtk_im_context_wrapper.cc

 // Copyright (c) 2011 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/renderer_host/gtk_im_context_wrapper.h"
 
 #include <gdk/gdk.h>
 #include <gdk/gdkkeysyms.h>
 #include <gtk/gtk.h>
 
@@ skipping 207 matching lines @@
 
     if (!suppress)
       host_view_->ForwardKeyboardEvent(wke);
   }
 
   last_key_code_ = key_code;
   last_key_was_up_ = (event->type == GDK_KEY_RELEASE);
   last_key_filtered_no_result_ = (filtered && !has_result);
 }
 
-void GtkIMContextWrapper::UpdateInputMethodState(WebKit::WebTextInputType type,
-                                                 const gfx::Rect& caret_rect) {
+void GtkIMContextWrapper::UpdateInputMethodState(
+    ui::TextInputType type,
+    bool can_compose_inline,
+    const gfx::Rect& caret_rect) {
   suppress_next_commit_ = false;
 
   // The renderer has updated its IME status.
   // Control the GtkIMContext object according to this status.
   if (!context_ || !is_focused_)
     return;
 
   DCHECK(!is_in_key_event_handler_);
 
-  bool is_enabled = (type == WebKit::WebTextInputTypeText);
+  bool is_enabled = (type == ui::TEXT_INPUT_TYPE_TEXT);
   if (is_enabled_ != is_enabled) {
     is_enabled_ = is_enabled;
     if (is_enabled)
       gtk_im_context_focus_in(context_);
     else
       gtk_im_context_focus_out(context_);
   }
 
   if (is_enabled) {
+    // If the focused element supports inline rendering of composition text,
+    // we receive and send related events to it. Otherwise, the events related
+    // to the updates of composition text are directed to the candidate window.
+    gtk_im_context_set_use_preedit(context_, can_compose_inline);
     // Updates the position of the IME candidate window.
     // The position sent from the renderer is a relative one, so we need to
     // attach the GtkIMContext object to this window before changing the
     // position.
     GdkRectangle cursor_rect(caret_rect.ToGdkRectangle());
     gtk_im_context_set_cursor_location(context_, &cursor_rect);
   }
 }
 
 void GtkIMContextWrapper::OnFocusIn() {
@@ skipping 367 matching lines @@
 
 void GtkIMContextWrapper::HandleHostViewRealizeThunk(
     GtkWidget* widget, GtkIMContextWrapper* self) {
   self->HandleHostViewRealize(widget);
 }
 
 void GtkIMContextWrapper::HandleHostViewUnrealizeThunk(
     GtkWidget* widget, GtkIMContextWrapper* self) {
   self->HandleHostViewUnrealize();
 }