Remove Hung plugin detector

chrome/browser/hang_monitor/hung_plugin_action.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include <windows.h>
-
-#include "chrome/browser/hang_monitor/hung_plugin_action.h"
-
-#include "base/metrics/histogram.h"
-#include "base/version.h"
-#include "base/win/win_util.h"
-#include "chrome/browser/ui/simple_message_box.h"
-#include "chrome/common/logging_chrome.h"
-#include "chrome/grit/generated_resources.h"
-#include "content/public/browser/plugin_service.h"
-#include "content/public/common/webplugininfo.h"
-#include "ui/base/l10n/l10n_util.h"
-#include "ui/gfx/win/hwnd_util.h"
-
-HungPluginAction::HungPluginAction() : current_hung_plugin_window_(NULL) {
-}
-
-HungPluginAction::~HungPluginAction() {
-}
-
-bool HungPluginAction::OnHungWindowDetected(HWND hung_window,
-                                            HWND top_level_window,
-                                            ActionOnHungWindow* action) {
-  if (NULL == action) {
-    return false;
-  }
-  if (!IsWindow(hung_window)) {
-    return false;
-  }
-
-  bool continue_hang_detection = true;
-
-  DWORD hung_window_process_id = 0;
-  DWORD top_level_window_process_id = 0;
-  GetWindowThreadProcessId(hung_window, &hung_window_process_id);
-  GetWindowThreadProcessId(top_level_window, &top_level_window_process_id);
-
-  *action = HungWindowNotification::HUNG_WINDOW_IGNORE;
-  if (top_level_window_process_id != hung_window_process_id) {
-    base::string16 plugin_name =
-        l10n_util::GetStringUTF16(IDS_UNKNOWN_PLUGIN_NAME);
-
-    if (logging::DialogsAreSuppressed()) {
-      NOTREACHED() << "Terminated a hung plugin process.";
-      *action = HungWindowNotification::HUNG_WINDOW_TERMINATE_PROCESS;
-    } else {
-      const base::string16 title = l10n_util::GetStringUTF16(
-          IDS_BROWSER_HANGMONITOR_TITLE);
-      const base::string16 message = l10n_util::GetStringFUTF16(
-          IDS_BROWSER_HANGMONITOR, plugin_name);
-      // Before displaying the message box, invoke SendMessageCallback on the
-      // hung window. If the callback ever hits, the window is not hung anymore
-      // and we can dismiss the message box.
-      SendMessageCallback(hung_window,
-                          WM_NULL,
-                          0,
-                          0,
-                          HungWindowResponseCallback,
-                          reinterpret_cast<ULONG_PTR>(this));
-      current_hung_plugin_window_ = hung_window;
-      if (chrome::ShowQuestionMessageBox(NULL, title, message) ==
-          chrome::MESSAGE_BOX_RESULT_YES) {
-        *action = HungWindowNotification::HUNG_WINDOW_TERMINATE_PROCESS;
-      } else {
-        // If the user choses to ignore the hung window warning, the
-        // message timeout for this window should be doubled. We only
-        // double the timeout property on the window if the property
-        // exists. The property is deleted if the window becomes
-        // responsive.
-        continue_hang_detection = false;
-        int child_window_message_timeout = base::win::HandleToUint32(
-            GetProp(hung_window, HungWindowDetector::kHungChildWindowTimeout));
-        if (child_window_message_timeout) {
-          child_window_message_timeout *= 2;
-#pragma warning(disable:4312)
-          SetProp(hung_window, HungWindowDetector::kHungChildWindowTimeout,
-                  reinterpret_cast<HANDLE>(child_window_message_timeout));
-#pragma warning(default:4312)
-        }
-      }
-      current_hung_plugin_window_ = NULL;
-    }
-  }
-  if (HungWindowNotification::HUNG_WINDOW_TERMINATE_PROCESS == *action) {
-    // Enable the top-level window just in case the plugin had been
-    // displaying a modal box that had disabled the top-level window
-    EnableWindow(top_level_window, TRUE);
-  }
-  return continue_hang_detection;
-}
-
-void HungPluginAction::OnWindowResponsive(HWND window) {
-  if (window == current_hung_plugin_window_) {
-    // The message timeout for this window should fallback to the default
-    // timeout as this window is now responsive.
-    RemoveProp(window, HungWindowDetector::kHungChildWindowTimeout);
-    // The monitored plugin recovered. Let's dismiss the message box.
-    EnumThreadWindows(GetCurrentThreadId(),
-                      reinterpret_cast<WNDENUMPROC>(DismissMessageBox),
-                      NULL);
-  }
-}
-
-// static
-BOOL CALLBACK HungPluginAction::DismissMessageBox(HWND window, LPARAM ignore) {
-  base::string16 class_name = gfx::GetClassName(window);
-  // #32770 is the dialog window class which is the window class of
-  // the message box being displayed.
-  if (class_name == L"#32770") {
-    EndDialog(window, IDNO);
-    return FALSE;
-  }
-  return TRUE;
-}
-
-// static
-void CALLBACK HungPluginAction::HungWindowResponseCallback(HWND target_window,
-                                                           UINT message,
-                                                           ULONG_PTR data,
-                                                           LRESULT result) {
-  HungPluginAction* instance = reinterpret_cast<HungPluginAction*>(data);
-  DCHECK(NULL != instance);
-  if (NULL != instance) {
-    instance->OnWindowResponsive(target_window);
-  }
-}