Pepper IME API for surrounding text retrieval.

ppapi/thunk/ppb_text_input_api.h

Index: ppapi/thunk/ppb_text_input_api.h
diff --git a/ppapi/thunk/ppb_text_input_api.h b/ppapi/thunk/ppb_text_input_api.h
index d826b20ca18d246977607fe5925c527d7f7b359b..2eca15a6428c44b98cab19e52d138528c42849d9 100644
--- a/ppapi/thunk/ppb_text_input_api.h
+++ b/ppapi/thunk/ppb_text_input_api.h
@@ -21,6 +21,11 @@ class PPB_TextInput_FunctionAPI {
                                    const PP_Rect& caret,
                                    const PP_Rect& bounding_box) = 0;
   virtual void CancelCompositionText(PP_Instance instance) = 0;
+  virtual void SelectionChanged(PP_Instance instance) = 0;
+  virtual void UpdateSurroundingText(PP_Instance instance,
+                                     const char* text,
+                                     uint32_t caret,
+                                     uint32_t anchor) = 0;
 
   static const ApiID kApiID = API_ID_PPB_TEXT_INPUT;
 };