IME (input method editor) support for Aura, part 1 of 3: Add ui/base/ime/ classes

ui/base/ime/text_input_client.h

Index: ui/base/ime/text_input_client.h
diff --git a/ui/base/ime/text_input_client.h b/ui/base/ime/text_input_client.h
index 01f5152bf63394fc82ba12d887413c2c10a3af6f..4d1030954c1579492b28dda775d581232a2f6ba1 100644
--- a/ui/base/ime/text_input_client.h
+++ b/ui/base/ime/text_input_client.h
@@ -60,9 +60,15 @@ class UI_EXPORT TextInputClient {
   // TEXT_INPUT_TYPE_NONE at runtime.
   virtual ui::TextInputType GetTextInputType() const = 0;
 
-  // Returns current caret (insertion point) bounds relative to the View’s
+  // Returns current caret (insertion point) bounds relative to the screen
   // coordinates. If there is selection, then the selection bounds will be
   // returned.
+  // TODO(yusukes): Currently views::NativeTextfieldViews which implements this
+  // interface returns its view's coordinates. We should to do the following:
+  // 1) Modify NativeTextfieldViews so it returns screen coordinates.
+  // 2) Remove view-to-screen coordinates conversion code in InputMethodBridge.
+  // 3) Modify InputMethodWin. It requires a rect in toplevel window's
+  //    coordinates instead of screen.
   virtual gfx::Rect GetCaretBounds() = 0;
 
   // Returns true if there is composition text.