Merge to XFA: Cleanup: Remove CFFL_IFormFiller::GetCommitKey() that always returns 0.

Remove callers and related code that all just pass zeros around.

Also remove CFFL_IFormFiller::GetKeyDown().

R=tsepez@chromium.org

Review URL: https://codereview.chromium.org/1149623012.

(cherry picked from commit 35c3163d55bebea8095474181f807ddfb2f4f806)

Review URL: https://codereview.chromium.org/1175083003.
diff --git a/fpdfsdk/include/javascript/JS_EventHandler.h b/fpdfsdk/include/javascript/JS_EventHandler.h
index a990307..8389831 100644
--- a/fpdfsdk/include/javascript/JS_EventHandler.h
+++ b/fpdfsdk/include/javascript/JS_EventHandler.h
@@ -80,8 +80,8 @@
 	void					OnPage_OutView(CPDFSDK_Document* pTarget);
 	
 	void					OnField_Calculate(CPDF_FormField* pSource, CPDF_FormField* pTarget, CFX_WideString& Value, FX_BOOL& bRc);
-	void					OnField_Format(int nCommitKey, CPDF_FormField* pTarget, CFX_WideString& Value, FX_BOOL bWillCommit);
-	void					OnField_Keystroke(int nCommitKey, CFX_WideString& strChange, const CFX_WideString& strChangeEx,
+	void					OnField_Format(CPDF_FormField* pTarget, CFX_WideString& Value, FX_BOOL bWillCommit);
+	void					OnField_Keystroke(CFX_WideString& strChange, const CFX_WideString& strChangeEx,
 								FX_BOOL KeyDown, FX_BOOL bModifier, int &nSelEnd,int &nSelStart, FX_BOOL bShift,
 								CPDF_FormField* pTarget, CFX_WideString& Value, FX_BOOL bWillCommit, 
 								FX_BOOL bFieldFull, FX_BOOL &bRc);