import changes from `dev' branch of rmottola/Arctic-Fox:

- let->var (7417185de3)
- Bug 1200194 - Expose nsCaret::GetFrameAndOffset for reuse. r=roc This function can be reused by AccessibleCaret. (4506d97981)
- Bug 1200194 - Fix AccessibleCaret is out of scrollport in cursor mode. r=roc (3c80be5af1)
- Bug 1175171 - Deallocate GTK's KeymapWrapper on shutdown. r=karlt (e5e5468d71)
- Bug 895274 part.6 Rename NS_EVENT_ALL to eAllEvents r=smaug (cc76e8ecc8)
- Bug 895274 part.7 Rename NS_WINDOW_START to eWindowEventFirst r=smaug (c7414fa347)
- Bug 895274 part.8 Rename NS_XUL_CLOSE to eWindowClose r=smaug (30e8142328)
- Bug 895274 part.5 Rename NS_EVENT_NULL to eVoidEvent r=smaug (1950fb6c82)
- Bug 895274 part.4 Clean up the macro names of EventNameList.h r=smaug (46a0c74362)
- Bug 895274 part.9 Rename NS_KEY_PRESS to eKeyPress r=smaug (fb863b578a)
- Bug 895274 part.10 Rename NS_KEY_UP to eKeyUp r=smaug (67a2e3c03a)
- fix (f3a9ad8088)
- Bug 1137557 - Part 1: Allow callee of TIP.keydown() to figure out preventDefault() of keydown and keypress event. r=masayuki, r+sr=smaug (c1d9bca9d0)
- Bug 1119133 Implement TextEventDispatcher::EndInputTransaction() for ensuring TextEventDispatcher forgets the link with TextInputProcessor r=smaug (fffdced45e)

dom/html/HTMLButtonElement.cpp

@@ -287,22 +287,22 @@ HTMLButtonElement::PostHandleEvent(EventChainPostVisitor& aVisitor)
 
   if (nsEventStatus_eIgnore == aVisitor.mEventStatus) {
     switch (aVisitor.mEvent->mMessage) {
-      case NS_KEY_PRESS:
-      case NS_KEY_UP:
+      case eKeyPress:
+      case eKeyUp:
         {
           // For backwards compat, trigger buttons with space or enter
           // (bug 25300)
           WidgetKeyboardEvent* keyEvent = aVisitor.mEvent->AsKeyboardEvent();
           if ((keyEvent->keyCode == NS_VK_RETURN &&
-               NS_KEY_PRESS == aVisitor.mEvent->mMessage) ||
+               eKeyPress == aVisitor.mEvent->mMessage) ||
               (keyEvent->keyCode == NS_VK_SPACE &&
-               NS_KEY_UP == aVisitor.mEvent->mMessage)) {
+               eKeyUp == aVisitor.mEvent->mMessage)) {
             DispatchSimulatedClick(this, aVisitor.mEvent->mFlags.mIsTrusted,
                                    aVisitor.mPresContext);
             aVisitor.mEventStatus = nsEventStatus_eConsumeNoDefault;
           }
         }
-        break;// NS_KEY_PRESS
+        break;
 
       case NS_MOUSE_BUTTON_DOWN:
         {