diff -r 000000000000 -r 6474c204b198 widget/windows/nsToolkit.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/widget/windows/nsToolkit.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,235 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsToolkit.h"
+#include "nsAppShell.h"
+#include "nsWindow.h"
+#include "nsWidgetsCID.h"
+#include "prmon.h"
+#include "prtime.h"
+#include "nsIServiceManager.h"
+#include "nsComponentManagerUtils.h"
+#include <objbase.h>
+#include "WinUtils.h"
+
+#include "nsUXThemeData.h"
+
+// unknwn.h is needed to build with WIN32_LEAN_AND_MEAN
+#include <unknwn.h>
+
+using namespace mozilla::widget;
+
+nsToolkit* nsToolkit::gToolkit = nullptr;
+HINSTANCE nsToolkit::mDllInstance = 0;
+static const unsigned long kD3DUsageDelay = 5000;
+
+static void
+StartAllowingD3D9(nsITimer *aTimer, void *aClosure)
+{
+  if (XRE_GetWindowsEnvironment() == WindowsEnvironmentType_Desktop) {
+    nsWindow::StartAllowingD3D9(true);
+  }
+}
+
+MouseTrailer*       nsToolkit::gMouseTrailer;
+
+//-------------------------------------------------------------------------
+//
+// constructor
+//
+//-------------------------------------------------------------------------
+nsToolkit::nsToolkit()  
+{
+    MOZ_COUNT_CTOR(nsToolkit);
+
+#if defined(MOZ_STATIC_COMPONENT_LIBS)
+    nsToolkit::Startup(GetModuleHandle(nullptr));
+#endif
+
+    gMouseTrailer = &mMouseTrailer;
+
+    if (XRE_GetWindowsEnvironment() == WindowsEnvironmentType_Desktop) {
+      mD3D9Timer = do_CreateInstance("@mozilla.org/timer;1");
+      mD3D9Timer->InitWithFuncCallback(::StartAllowingD3D9,
+                                       nullptr,
+                                       kD3DUsageDelay,
+                                       nsITimer::TYPE_ONE_SHOT);
+    }
+}
+
+
+//-------------------------------------------------------------------------
+//
+// destructor
+//
+//-------------------------------------------------------------------------
+nsToolkit::~nsToolkit()
+{
+    MOZ_COUNT_DTOR(nsToolkit);
+    gMouseTrailer = nullptr;
+}
+
+void
+nsToolkit::Startup(HMODULE hModule)
+{
+    nsToolkit::mDllInstance = hModule;
+    WinUtils::Initialize();
+    nsUXThemeData::Initialize();
+}
+
+void
+nsToolkit::Shutdown()
+{
+    delete gToolkit;
+    gToolkit = nullptr;
+}
+
+void
+nsToolkit::StartAllowingD3D9()
+{
+  if (XRE_GetWindowsEnvironment() == WindowsEnvironmentType_Desktop) {
+    nsToolkit::GetToolkit()->mD3D9Timer->Cancel();
+    nsWindow::StartAllowingD3D9(false);
+  }
+}
+
+//-------------------------------------------------------------------------
+//
+// Return the nsToolkit for the current thread.  If a toolkit does not
+// yet exist, then one will be created...
+//
+//-------------------------------------------------------------------------
+// static
+nsToolkit* nsToolkit::GetToolkit()
+{
+  if (!gToolkit) {
+    gToolkit = new nsToolkit();
+  }
+
+  return gToolkit;
+}
+
+
+//-------------------------------------------------------------------------
+//
+//
+//-------------------------------------------------------------------------
+MouseTrailer::MouseTrailer() : mMouseTrailerWindow(nullptr), mCaptureWindow(nullptr),
+  mIsInCaptureMode(false), mEnabled(true)
+{
+}
+//-------------------------------------------------------------------------
+//
+//
+//-------------------------------------------------------------------------
+MouseTrailer::~MouseTrailer()
+{
+  DestroyTimer();
+}
+//-------------------------------------------------------------------------
+//
+//
+//-------------------------------------------------------------------------
+void MouseTrailer::SetMouseTrailerWindow(HWND aWnd) 
+{
+  if (mMouseTrailerWindow != aWnd && mTimer) {
+    // Make sure TimerProc is fired at least once for the old window
+    TimerProc(nullptr, nullptr);
+  }
+  mMouseTrailerWindow = aWnd;
+  CreateTimer();
+}
+
+//-------------------------------------------------------------------------
+//
+//
+//-------------------------------------------------------------------------
+void MouseTrailer::SetCaptureWindow(HWND aWnd) 
+{ 
+  mCaptureWindow = aWnd;
+  if (mCaptureWindow) {
+    mIsInCaptureMode = true;
+  }
+}
+
+//-------------------------------------------------------------------------
+//
+//
+//-------------------------------------------------------------------------
+nsresult MouseTrailer::CreateTimer()
+{
+  if (mTimer || !mEnabled) {
+    return NS_OK;
+  } 
+
+  nsresult rv;
+  mTimer = do_CreateInstance("@mozilla.org/timer;1", &rv);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return mTimer->InitWithFuncCallback(TimerProc, nullptr, 200,
+                                      nsITimer::TYPE_REPEATING_SLACK);
+}
+
+//-------------------------------------------------------------------------
+//
+//
+//-------------------------------------------------------------------------
+void MouseTrailer::DestroyTimer()
+{
+  if (mTimer) {
+    mTimer->Cancel();
+    mTimer = nullptr;
+  }
+}
+
+//-------------------------------------------------------------------------
+//
+//
+//-------------------------------------------------------------------------
+void MouseTrailer::TimerProc(nsITimer* aTimer, void* aClosure)
+{
+  MouseTrailer *mtrailer = nsToolkit::gMouseTrailer;
+  NS_ASSERTION(mtrailer, "MouseTrailer still firing after deletion!");
+
+  // Check to see if we are in mouse capture mode,
+  // Once capture ends we could still get back one more timer event.
+  // Capture could end outside our window.
+  // Also, for some reason when the mouse is on the frame it thinks that
+  // it is inside the window that is being captured.
+  if (mtrailer->mCaptureWindow) {
+    if (mtrailer->mCaptureWindow != mtrailer->mMouseTrailerWindow) {
+      return;
+    }
+  } else {
+    if (mtrailer->mIsInCaptureMode) {
+      // mMouseTrailerWindow could be bad from rolling over the frame, so clear 
+      // it if we were capturing and now this is the first timer callback 
+      // since we canceled the capture
+      mtrailer->mMouseTrailerWindow = nullptr;
+      mtrailer->mIsInCaptureMode = false;
+      return;
+    }
+  }
+
+  if (mtrailer->mMouseTrailerWindow && ::IsWindow(mtrailer->mMouseTrailerWindow)) {
+    POINT mp;
+    DWORD pos = ::GetMessagePos();
+    mp.x = GET_X_LPARAM(pos);
+    mp.y = GET_Y_LPARAM(pos);
+    HWND mouseWnd = ::WindowFromPoint(mp);
+    if (mtrailer->mMouseTrailerWindow != mouseWnd) {
+      // Notify someone that a mouse exit happened.
+      PostMessage(mtrailer->mMouseTrailerWindow, WM_MOUSELEAVE, 0, 0);
+
+      // we are out of this window, destroy timer
+      mtrailer->DestroyTimer();
+      mtrailer->mMouseTrailerWindow = nullptr;
+    }
+  } else {
+    mtrailer->DestroyTimer();
+    mtrailer->mMouseTrailerWindow = nullptr;
+  }
+}
+