Ctrl/Alt+Enter shouldn't insert newline

third_party/WebKit/Source/core/editing/EditingBehavior.cpp

 /*
  * Copyright (C) 2006, 2007 Apple, Inc.  All rights reserved.
  * Copyright (C) 2012 Google, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 155 matching lines @@
     { 'Z',         CtrlKey | ShiftKey, "Redo"                                 },
     { 'Y',         CtrlKey,            "Redo"                                 },
 #endif
     { VKEY_INSERT, 0,                  "OverWrite"                            },
 };
 
 static const KeyPressEntry keyPressEntries[] = {
     { '\t',   0,                  "InsertTab"                                 },
     { '\t',   ShiftKey,           "InsertBacktab"                             },
     { '\r',   0,                  "InsertNewline"                             },
-    { '\r',   CtrlKey,            "InsertNewline"                             },
     { '\r',   ShiftKey,           "InsertLineBreak"                           },
-    { '\r',   AltKey,             "InsertNewline"                             },
-    { '\r',   AltKey | ShiftKey,  "InsertNewline"                             },
 };
 
 const char* EditingBehavior::interpretKeyEvent(const KeyboardEvent& event) const
 {
     const PlatformKeyboardEvent* keyEvent = event.keyEvent();
     if (!keyEvent)
         return "";
 
     static HashMap<int, const char*>* keyDownCommandsMap = nullptr;
     static HashMap<int, const char*>* keyPressCommandsMap = nullptr;
@@ skipping 67 matching lines @@
         if (event.keyEvent()->metaKey())
             return false;
 #endif
     }
 #endif
 
     return true;
 }
 } // namespace blink