Split ui/base/ime into a new component

ui/base/ime/composition_text.h

Index: ui/base/ime/composition_text.h
diff --git a/ui/base/ime/composition_text.h b/ui/base/ime/composition_text.h
index e4974bdd7b5d20e4c9ee44b1a3f810b911cf83ee..063592e11aa39df2361bdef9bcd997efcc40f490 100644
--- a/ui/base/ime/composition_text.h
+++ b/ui/base/ime/composition_text.h
@@ -7,13 +7,13 @@
 
 #include "base/strings/string16.h"
 #include "ui/base/ime/composition_underline.h"
-#include "ui/base/ui_base_export.h"
+#include "ui/base/ime/ui_base_ime_export.h"
 #include "ui/gfx/range/range.h"
 
 namespace ui {
 
 // A struct represents the status of an ongoing composition text.
-struct UI_BASE_EXPORT CompositionText {
+struct UI_BASE_IME_EXPORT CompositionText {
   CompositionText();
   ~CompositionText();