Remove CFWL_NoteLoop and associated code. All of this code is no longer used after commit a96e2eb6. BUG=chromium:976429 Change-Id: I4b4056234a6b50aa3ec0ec2f9965a661a7d769c9 Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/56510 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>

diff --git a/xfa/fwl/BUILD.gn b/xfa/fwl/BUILD.gn
index 1ac7472..064a4eb 100644
--- a/xfa/fwl/BUILD.gn
+++ b/xfa/fwl/BUILD.gn

@@ -64,8 +64,6 @@
     "cfwl_monthcalendar.h",
     "cfwl_notedriver.cpp",
     "cfwl_notedriver.h",
-    "cfwl_noteloop.cpp",
-    "cfwl_noteloop.h",
     "cfwl_picturebox.cpp",
     "cfwl_picturebox.h",
     "cfwl_pushbutton.cpp",

diff --git a/xfa/fwl/cfwl_notedriver.cpp b/xfa/fwl/cfwl_notedriver.cpp
index 4943957..190a6d4 100644
--- a/xfa/fwl/cfwl_notedriver.cpp
+++ b/xfa/fwl/cfwl_notedriver.cpp

@@ -20,13 +20,10 @@
 #include "xfa/fwl/cfwl_messagemouse.h"
 #include "xfa/fwl/cfwl_messagemousewheel.h"
 #include "xfa/fwl/cfwl_messagesetfocus.h"
-#include "xfa/fwl/cfwl_noteloop.h"
 #include "xfa/fwl/cfwl_widgetmgr.h"
 #include "xfa/fwl/fwl_widgetdef.h"
 
-CFWL_NoteDriver::CFWL_NoteDriver()
-    : m_pNoteLoop(pdfium::MakeUnique<CFWL_NoteLoop>()) {
-}
+CFWL_NoteDriver::CFWL_NoteDriver() = default;
 
 CFWL_NoteDriver::~CFWL_NoteDriver() = default;
 
@@ -83,17 +80,6 @@
   return true;
 }
 
-void CFWL_NoteDriver::Run() {
-#if defined(OS_LINUX) || defined(OS_WIN)
-  for (;;) {
-    CFWL_NoteLoop* pTopLoop = GetTopLoop();
-    if (!pTopLoop || !pTopLoop->ContinueModal())
-      break;
-    UnqueueMessageAndProcess(pTopLoop);
-  }
-#endif  // defined(OS_LINUX) || defined(OS_WIN)
-}
-
 void CFWL_NoteDriver::NotifyTargetHide(CFWL_Widget* pNoteTarget) {
   if (m_pFocus == pNoteTarget)
     m_pFocus = nullptr;
@@ -114,22 +100,6 @@
   UnregisterEventTarget(pNoteTarget);
 }
 
-void CFWL_NoteDriver::QueueMessage(std::unique_ptr<CFWL_Message> pMessage) {
-  m_NoteQueue.push_back(std::move(pMessage));
-}
-
-void CFWL_NoteDriver::UnqueueMessageAndProcess(CFWL_NoteLoop* pNoteLoop) {
-  if (m_NoteQueue.empty())
-    return;
-
-  std::unique_ptr<CFWL_Message> pMessage = std::move(m_NoteQueue.front());
-  m_NoteQueue.pop_front();
-  if (!IsValidMessage(pMessage.get()))
-    return;
-
-  ProcessMessage(std::move(pMessage));
-}
-
 void CFWL_NoteDriver::ProcessMessage(std::unique_ptr<CFWL_Message> pMessage) {
   CFWL_Widget* pMessageForm = pMessage->GetDstTarget();
   if (!pMessageForm)
@@ -307,18 +277,12 @@
   DispatchMessage(&msHover, nullptr);
 }
 
-bool CFWL_NoteDriver::IsValidMessage(CFWL_Message* pMessage) {
-  CFWL_Widget* pForm = m_pNoteLoop->GetForm();
-  return pForm && pForm == pMessage->GetDstTarget();
-}
-
 CFWL_Widget* CFWL_NoteDriver::GetMessageForm(CFWL_Widget* pDstTarget) {
-  CFWL_Widget* pMessageForm = m_pNoteLoop->GetForm();
-  if (!pMessageForm && pDstTarget) {
-    CFWL_WidgetMgr* pWidgetMgr = pDstTarget->GetOwnerApp()->GetWidgetMgr();
-    pMessageForm = pWidgetMgr->GetSystemFormWidget(pDstTarget);
-  }
-  return pMessageForm;
+  if (!pDstTarget)
+    return nullptr;
+
+  CFWL_WidgetMgr* pWidgetMgr = pDstTarget->GetOwnerApp()->GetWidgetMgr();
+  return pWidgetMgr->GetSystemFormWidget(pDstTarget);
 }
 
 void CFWL_NoteDriver::ClearEventTargets() {

diff --git a/xfa/fwl/cfwl_notedriver.h b/xfa/fwl/cfwl_notedriver.h
index f15fef7..1de761b 100644
--- a/xfa/fwl/cfwl_notedriver.h
+++ b/xfa/fwl/cfwl_notedriver.h

@@ -7,7 +7,6 @@
 #ifndef XFA_FWL_CFWL_NOTEDRIVER_H_
 #define XFA_FWL_CFWL_NOTEDRIVER_H_
 
-#include <deque>
 #include <map>
 #include <memory>
 #include <vector>
@@ -18,7 +17,6 @@
 #include "xfa/fxgraphics/cxfa_graphics.h"
 
 class CFWL_EventTarget;
-class CFWL_NoteLoop;
 class CFWL_TargetImp;
 class CFWL_Widget;
 
@@ -33,19 +31,15 @@
   void UnregisterEventTarget(CFWL_Widget* pListener);
   void ClearEventTargets();
 
-  CFWL_NoteLoop* GetTopLoop() const { return m_pNoteLoop.get(); }
   CFWL_Widget* GetFocus() const { return m_pFocus.Get(); }
   bool SetFocus(CFWL_Widget* pFocus);
   void SetGrab(CFWL_Widget* pGrab, bool bSet) {
     m_pGrab = bSet ? pGrab : nullptr;
   }
 
-  void Run();
   void NotifyTargetHide(CFWL_Widget* pNoteTarget);
   void NotifyTargetDestroy(CFWL_Widget* pNoteTarget);
   void ProcessMessage(std::unique_ptr<CFWL_Message> pMessage);
-  void QueueMessage(std::unique_ptr<CFWL_Message> pMessage);
-  void UnqueueMessageAndProcess(CFWL_NoteLoop* pNoteLoop);
 
  private:
   bool DispatchMessage(CFWL_Message* pMessage, CFWL_Widget* pMessageForm);
@@ -56,11 +50,8 @@
   bool DoWheel(CFWL_Message* pMsg, CFWL_Widget* pMessageForm);
   bool DoMouseEx(CFWL_Message* pMsg, CFWL_Widget* pMessageForm);
   void MouseSecondary(CFWL_Message* pMsg);
-  bool IsValidMessage(CFWL_Message* pMessage);
   CFWL_Widget* GetMessageForm(CFWL_Widget* pDstTarget);
 
-  std::deque<std::unique_ptr<CFWL_Message>> m_NoteQueue;
-  std::unique_ptr<CFWL_NoteLoop> const m_pNoteLoop;
   std::map<uint32_t, std::unique_ptr<CFWL_EventTarget>> m_eventTargets;
   UnownedPtr<CFWL_Widget> m_pHover;
   UnownedPtr<CFWL_Widget> m_pFocus;

diff --git a/xfa/fwl/cfwl_noteloop.cpp b/xfa/fwl/cfwl_noteloop.cpp
deleted file mode 100644
index ff35a1a..0000000
--- a/xfa/fwl/cfwl_noteloop.cpp
+++ /dev/null

@@ -1,9 +0,0 @@
-// Copyright 2016 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/cfwl_noteloop.h"
-
-CFWL_NoteLoop::CFWL_NoteLoop() : m_bContinueModal(true) {}

diff --git a/xfa/fwl/cfwl_noteloop.h b/xfa/fwl/cfwl_noteloop.h
deleted file mode 100644
index 57e1a14..0000000
--- a/xfa/fwl/cfwl_noteloop.h
+++ /dev/null

@@ -1,27 +0,0 @@
-// Copyright 2016 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
-
-#ifndef XFA_FWL_CFWL_NOTELOOP_H_
-#define XFA_FWL_CFWL_NOTELOOP_H_
-
-class CFWL_Widget;
-
-class CFWL_NoteLoop {
- public:
-  CFWL_NoteLoop();
-  ~CFWL_NoteLoop() {}
-
-  CFWL_Widget* GetForm() const { return m_pForm; }
-  bool ContinueModal() const { return m_bContinueModal; }
-  void EndModalLoop() { m_bContinueModal = false; }
-  void SetMainForm(CFWL_Widget* pForm) { m_pForm = pForm; }
-
- private:
-  CFWL_Widget* m_pForm;
-  bool m_bContinueModal;
-};
-
-#endif  // XFA_FWL_CFWL_NOTELOOP_H_

diff --git a/xfa/fwl/cfwl_widgetmgr.cpp b/xfa/fwl/cfwl_widgetmgr.cpp
index a95386f..ba3c368 100644
--- a/xfa/fwl/cfwl_widgetmgr.cpp
+++ b/xfa/fwl/cfwl_widgetmgr.cpp

@@ -323,12 +323,6 @@
 
   CFWL_NoteDriver* pNoteDriver = pDstWidget->GetOwnerApp()->GetNoteDriver();
   pNoteDriver->ProcessMessage(pMessage->Clone());
-
-#if defined(OS_MACOSX)
-  CFWL_NoteLoop* pTopLoop = pNoteDriver->GetTopLoop();
-  if (pTopLoop)
-    pNoteDriver->UnqueueMessageAndProcess(pTopLoop);
-#endif
 }
 
 void CFWL_WidgetMgr::OnDrawWidget(CFWL_Widget* pWidget,