linux-aura: Supports Compose key with XIM.

chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.h

Index: chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.h
diff --git a/chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.h b/chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.h
index 9b6bdf223ea05bc6e6daefc39ae03bf303c218cc..098a76892a83bb9ef83a4a1d99b94d4e556d7c0a 100644
--- a/chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.h
+++ b/chrome/browser/ui/libgtk2ui/x11_input_method_context_impl_gtk2.h
@@ -13,6 +13,7 @@
 #include "ui/base/ime/linux/linux_input_method_context.h"
 #include "ui/gfx/rect.h"
 
+typedef struct _GdkDrawable GdkWindow;
 typedef struct _GtkIMContext GtkIMContext;
 
 namespace libgtk2ui {
@@ -60,6 +61,9 @@ class X11InputMethodContextImplGtk2 : public ui::LinuxInputMethodContext {
   // text input type.  Can be NULL when it's not focused.
   GtkIMContext* gtk_context_;
 
+  // Last set client window.
+  GdkWindow* gdk_last_set_client_window_;
+
   // Last known caret bounds relative to the screen coordinates.
   gfx::Rect last_caret_bounds_;