Back out bug 1075670 for causing smoketest failures on B2G, bug 1133518 and friends. rs+a=kats

xpfe/appshell/nsWebShellWindow.cpp

@@ -71,8 +71,6 @@
 #include "mozilla/DebugOnly.h"
 #include "mozilla/MouseEvents.h"
 
-#include "nsPIWindowRoot.h"
-
 #ifdef XP_MACOSX
 #include "nsINativeMenuService.h"
 #define USE_NATIVE_MENUS
@@ -259,15 +257,6 @@ nsWebShellWindow::WindowMoved(nsIWidget* aWidget, int32_t x, int32_t y)
     pm->AdjustPopupsOnWindowChange(window);
   }
 
-  // Notify all tabs that the widget moved.
-  if (mDocShell && mDocShell->GetWindow()) {
-    nsCOMPtr<EventTarget> eventTarget = mDocShell->GetWindow()->GetTopWindowRoot();
-    nsContentUtils::DispatchChromeEvent(mDocShell->GetDocument(),
-                                        eventTarget,
-                                        NS_LITERAL_STRING("MozUpdateWindowPos"),
-                                        false, false, nullptr);
-  }
-
   // Persist position, but not immediately, in case this OS is firing
   // repeated move events as the user drags the window
   SetPersistenceTimer(PAD_POSITION);