Merge IFWL_App and FWL_AppImp together

xfa/fwl/core/ifwl_app.cpp

Index: xfa/fwl/core/ifwl_app.cpp
diff --git a/xfa/fwl/core/ifwl_app.cpp b/xfa/fwl/core/ifwl_app.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a47a76e4c0b9e860cc67d70a8ca1e49c667dfc40
--- /dev/null
+++ b/xfa/fwl/core/ifwl_app.cpp
@@ -0,0 +1,50 @@
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "xfa/fwl/core/ifwl_app.h"
+
+#include "third_party/base/ptr_util.h"
+#include "xfa/fwl/core/cfwl_widgetmgr.h"
+#include "xfa/fwl/core/fwl_noteimp.h"
+#include "xfa/fwl/core/ifwl_widget.h"
+#include "xfa/fxfa/app/xfa_fwladapter.h"
+
+CXFA_FWLAdapterWidgetMgr* FWL_GetAdapterWidgetMgr() {
+  return CFWL_WidgetMgr::GetInstance()->GetAdapterWidgetMgr();
+}
+
+CXFA_FFApp* FWL_GetAdapterNative() {
+  IFWL_App* pApp = FWL_GetApp();
+  if (!pApp)
+    return nullptr;
+  return pApp->GetAdapterNative();
+}
+
+static IFWL_App* g_theApp = nullptr;
+IFWL_App* FWL_GetApp() {
+  return g_theApp;
+}
+
+void FWL_SetApp(IFWL_App* pApp) {
+  g_theApp = pApp;
+}
+
+IFWL_App::IFWL_App(CXFA_FFApp* pAdapter)
+    : m_pAdapterNative(pAdapter),
+      m_pWidgetMgr(pdfium::MakeUnique<CFWL_WidgetMgr>(pAdapter)),
+      m_pNoteDriver(pdfium::MakeUnique<CFWL_NoteDriver>()) {}
+
+IFWL_App::~IFWL_App() {
+  CFWL_ToolTipContainer::DeleteInstance();
+}
+
+CXFA_FFApp* IFWL_App::GetAdapterNative() {
+  return m_pAdapterNative;
+}
+
+CFWL_WidgetMgr* IFWL_App::GetWidgetMgr() {
+  return m_pWidgetMgr.get();
+}