[Linux] Workaround issue 45478: IME dysfunctional after BACKSPACE

chrome/browser/renderer_host/gtk_im_context_wrapper.h

Index: chrome/browser/renderer_host/gtk_im_context_wrapper.h
diff --git a/chrome/browser/renderer_host/gtk_im_context_wrapper.h b/chrome/browser/renderer_host/gtk_im_context_wrapper.h
index 1538e2666cef3f5057e12b0d46f98bfd34e785f6..94d6bfaeb29fb5efe5497628bac692b2d4534001 100644
--- a/chrome/browser/renderer_host/gtk_im_context_wrapper.h
+++ b/chrome/browser/renderer_host/gtk_im_context_wrapper.h
@@ -14,6 +14,7 @@
 #include "base/gtest_prod_util.h"
 #include "base/string16.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebCompositionUnderline.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebInputEvent.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebTextInputType.h"
 
 namespace gfx {
@@ -100,6 +101,10 @@ class GtkIMContextWrapper {
   // client window.
   void HandleHostViewUnrealize();
 
+  // Sends a fake composition key event with specified event type. A composition
+  // key event is a key event with special key code 229.
+  void SendFakeCompositionKeyEvent(WebKit::WebInputEvent::Type type);
+
   // Signal handlers of GtkIMContext object.
   static void HandleCommitThunk(GtkIMContext* context, gchar* text,
                                 GtkIMContextWrapper* self);