An experimental fix for Issue 7707....

chrome/views/focus_manager.cc

Index: chrome/views/focus_manager.cc
===================================================================
--- chrome/views/focus_manager.cc	(revision 10251)
+++ chrome/views/focus_manager.cc	(working copy)
@@ -191,6 +191,13 @@
         if (RerouteMouseWheel(window, wParam, lParam))
           return 0;
         break;
+      case WM_IME_CHAR:
+        // Issue 7707: A rich-edit control may crash when it receives a
+        // WM_IME_CHAR message while it is processing a WM_IME_COMPOSITION
+        // message. Since view controls don't need WM_IME_CHAR messages,
+        // we prevent WM_IME_CHAR messages from being dispatched to view
+        // controls via the CallWindowProc() call.
+        return 0;
       default:
         break;
     }