Update some uses of char16 to use the base:: namespace.

ui/base/ime/input_method_ibus_unittest.cc

Index: ui/base/ime/input_method_ibus_unittest.cc
diff --git a/ui/base/ime/input_method_ibus_unittest.cc b/ui/base/ime/input_method_ibus_unittest.cc
index 49e5a404b1fc1e7da05b7a625d226ca604ae2d5c..c30e93941f101999374f1b8dcc75f00fb12c960d 100644
--- a/ui/base/ime/input_method_ibus_unittest.cc
+++ b/ui/base/ime/input_method_ibus_unittest.cc
@@ -259,7 +259,7 @@ class InputMethodIBusTest : public internal::InputMethodDelegate,
   virtual void InsertText(const base::string16& text) OVERRIDE {
     inserted_text_ = text;
   }
-  virtual void InsertChar(char16 ch, int flags) OVERRIDE {
+  virtual void InsertChar(base::char16 ch, int flags) OVERRIDE {
     inserted_char_ = ch;
     inserted_char_flags_ = flags;
   }
@@ -359,7 +359,7 @@ class InputMethodIBusTest : public internal::InputMethodDelegate,
   CompositionText composition_text_;
   CompositionText confirmed_text_;
   base::string16 inserted_text_;
-  char16 inserted_char_;
+  base::char16 inserted_char_;
   unsigned int on_input_method_changed_call_count_;
   int inserted_char_flags_;