[Editing] Introduce |CompositeEditCommand::willApplyEditing()| in prepare for 'beforeinput' (1/3)

third_party/WebKit/Source/core/editing/commands/TypingCommand.h

Index: third_party/WebKit/Source/core/editing/commands/TypingCommand.h
diff --git a/third_party/WebKit/Source/core/editing/commands/TypingCommand.h b/third_party/WebKit/Source/core/editing/commands/TypingCommand.h
index 49242a6bc4405b9ea382348852ab1b920c6dc62f..ecc6a3df2097432c17d46c927a6ed7a77490a758 100644
--- a/third_party/WebKit/Source/core/editing/commands/TypingCommand.h
+++ b/third_party/WebKit/Source/core/editing/commands/TypingCommand.h
@@ -107,8 +107,7 @@ class CORE_EXPORT TypingCommand final : public CompositeEditCommand {
 
   ETypingCommand commandTypeOfOpenCommand() const { return m_commandType; }
   TextCompositionType compositionType() const { return m_compositionType; }
-  // |TypingCommand| may contain multiple |InsertTextCommand|, should return
-  // |textDataForInputEvent()| of the last one.
+  // Returns text data of the last added typing.
   String textDataForInputEvent() const final;
 
  private:
@@ -160,6 +159,10 @@ class CORE_EXPORT TypingCommand final : public CompositeEditCommand {
                                                              LocalFrame*);
 
   void updatePreservesTypingStyle(ETypingCommand);
+  // Returns |false| to cancel adding typing.
+  bool willAddTypingToOpenCommand(EditCommandSource,
+                                  InputEvent::InputType,
+                                  const String& text = nullAtom);
   void typingAddedToOpenCommand(ETypingCommand);
   bool makeEditableRootEmpty(EditingState*);
 
@@ -171,6 +174,7 @@ class CORE_EXPORT TypingCommand final : public CompositeEditCommand {
 
   ETypingCommand m_commandType;
   String m_textToInsert;
+  InputEvent::InputType m_inputType;
   bool m_openForMoreTyping;
   bool m_selectInsertedText;
   bool m_smartDelete;