Move plugin message handling from TabContents into PluginMessageFilter.

Also, close infobars after allowing plugins to run (regressed in http://crrev.com/72166).

BUG=71116
TEST=none

Review URL: http://codereview.chromium.org/6336021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@73153 0039d316-1c4b-4281-b951-d872f2087c98

5 files changed, 337 insertions, 269 deletions

diff --git a/chrome/browser/plugin_observer.cc b/chrome/browser/plugin_observer.cc
new file mode 100644
index 0000000..529f21e
--- /dev/null
+++ b/chrome/browser/plugin_observer.cc
@@ -0,0 +1,290 @@
+// Copyright (c) 2011 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 "chrome/browser/plugin_observer.h"
+
+#include "base/utf_string_conversions.h"
+#include "chrome/browser/content_settings/host_content_settings_map.h"
+#include "chrome/browser/metrics/user_metrics.h"
+#include "chrome/browser/plugin_installer_infobar_delegate.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/renderer_host/render_view_host.h"
+#include "chrome/browser/tab_contents/infobar_delegate.h"
+#include "chrome/browser/tab_contents/tab_contents.h"
+#include "chrome/common/render_messages.h"
+#include "grit/generated_resources.h"
+#include "grit/theme_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "webkit/plugins/npapi/plugin_list.h"
+#include "webkit/plugins/npapi/webplugininfo.h"
+
+namespace {
+
+// PluginInfoBar --------------------------------------------------------------
+
+class PluginInfoBar : public ConfirmInfoBarDelegate {
+ public:
+  PluginInfoBar(TabContents* tab_contents, const string16& name);
+
+  // ConfirmInfoBarDelegate:
+  virtual SkBitmap* GetIcon() const;
+  virtual int GetButtons() const;
+  virtual string16 GetLinkText();
+
+ protected:
+  virtual ~PluginInfoBar();
+
+  void CommonCancel();
+  void CommonClose();
+  void CommonLearnMore(WindowOpenDisposition disposition);
+
+  string16 name_;
+  TabContents* tab_contents_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PluginInfoBar);
+};
+
+PluginInfoBar::PluginInfoBar(TabContents* tab_contents, const string16& name)
+    : ConfirmInfoBarDelegate(tab_contents),
+      name_(name),
+      tab_contents_(tab_contents) {
+}
+
+PluginInfoBar::~PluginInfoBar() {
+}
+
+void PluginInfoBar::CommonClose() {
+  delete this;
+}
+
+SkBitmap* PluginInfoBar::GetIcon() const {
+  return ResourceBundle::GetSharedInstance().GetBitmapNamed(
+      IDR_INFOBAR_PLUGIN_INSTALL);
+}
+
+int PluginInfoBar::GetButtons() const {
+  return BUTTON_OK | BUTTON_CANCEL;
+}
+
+void PluginInfoBar::CommonCancel() {
+  tab_contents_->render_view_host()->LoadBlockedPlugins();
+}
+
+string16 PluginInfoBar::GetLinkText() {
+  return l10n_util::GetStringUTF16(IDS_LEARN_MORE);
+}
+
+void PluginInfoBar::CommonLearnMore(WindowOpenDisposition disposition) {
+  // TODO(bauerb): Navigate to a help page explaining why we disabled
+  // or blocked the plugin, once we have one.
+}
+
+// BlockedPluginInfoBar -------------------------------------------------------
+
+class BlockedPluginInfoBar : public PluginInfoBar {
+ public:
+  BlockedPluginInfoBar(TabContents* tab_contents,
+                       const string16& name);
+
+  // ConfirmInfoBarDelegate:
+  virtual string16 GetMessageText() const;
+  virtual string16 GetButtonLabel(InfoBarButton button) const;
+  virtual bool Accept();
+  virtual bool Cancel();
+  virtual void InfoBarClosed();
+  virtual bool LinkClicked(WindowOpenDisposition disposition);
+
+ protected:
+  virtual ~BlockedPluginInfoBar();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(BlockedPluginInfoBar);
+};
+
+BlockedPluginInfoBar::BlockedPluginInfoBar(TabContents* tab_contents,
+                                           const string16& name)
+    : PluginInfoBar(tab_contents, name) {
+  tab_contents->AddInfoBar(this);
+  UserMetrics::RecordAction(UserMetricsAction("BlockedPluginInfobar.Shown"));
+}
+
+BlockedPluginInfoBar::~BlockedPluginInfoBar() {
+}
+
+string16 BlockedPluginInfoBar::GetMessageText() const {
+  return l10n_util::GetStringFUTF16(IDS_PLUGIN_NOT_AUTHORIZED, name_);
+}
+
+string16 BlockedPluginInfoBar::GetButtonLabel(InfoBarButton button) const {
+  return l10n_util::GetStringUTF16((button == BUTTON_OK) ?
+      IDS_PLUGIN_ENABLE_ALWAYS : IDS_PLUGIN_ENABLE_TEMPORARILY);
+}
+
+bool BlockedPluginInfoBar::Accept() {
+  UserMetrics::RecordAction(
+      UserMetricsAction("BlockedPluginInfobar.AlwaysAllow"));
+  tab_contents_->profile()->GetHostContentSettingsMap()->AddExceptionForURL(
+      tab_contents_->GetURL(), CONTENT_SETTINGS_TYPE_PLUGINS, std::string(),
+      CONTENT_SETTING_ALLOW);
+  tab_contents_->render_view_host()->LoadBlockedPlugins();
+  return true;
+}
+
+bool BlockedPluginInfoBar::Cancel() {
+  UserMetrics::RecordAction(
+      UserMetricsAction("BlockedPluginInfobar.AllowThisTime"));
+  CommonCancel();
+  return true;
+}
+
+void BlockedPluginInfoBar::InfoBarClosed() {
+  UserMetrics::RecordAction(UserMetricsAction("BlockedPluginInfobar.Closed"));
+  CommonClose();
+}
+
+bool BlockedPluginInfoBar::LinkClicked(WindowOpenDisposition disposition) {
+  UserMetrics::RecordAction(
+      UserMetricsAction("BlockedPluginInfobar.LearnMore"));
+  CommonLearnMore(disposition);
+  return false;
+}
+
+// OutdatedPluginInfoBar ------------------------------------------------------
+
+class OutdatedPluginInfoBar : public PluginInfoBar {
+ public:
+  OutdatedPluginInfoBar(TabContents* tab_contents,
+                        const string16& name,
+                        const GURL& update_url);
+
+  // ConfirmInfoBarDelegate:
+  virtual string16 GetMessageText() const;
+  virtual string16 GetButtonLabel(InfoBarButton button) const;
+  virtual bool Accept();
+  virtual bool Cancel();
+  virtual void InfoBarClosed();
+  virtual bool LinkClicked(WindowOpenDisposition disposition);
+
+ protected:
+  virtual ~OutdatedPluginInfoBar();
+
+ private:
+  GURL update_url_;
+
+  DISALLOW_COPY_AND_ASSIGN(OutdatedPluginInfoBar);
+};
+
+OutdatedPluginInfoBar::OutdatedPluginInfoBar(TabContents* tab_contents,
+                                             const string16& name,
+                                             const GURL& update_url)
+    : PluginInfoBar(tab_contents, name), update_url_(update_url) {
+  tab_contents->AddInfoBar(this);
+  UserMetrics::RecordAction(UserMetricsAction("OutdatedPluginInfobar.Shown"));
+}
+
+OutdatedPluginInfoBar::~OutdatedPluginInfoBar() {
+}
+
+string16 OutdatedPluginInfoBar::GetMessageText() const {
+  return l10n_util::GetStringFUTF16(IDS_PLUGIN_OUTDATED_PROMPT, name_);
+}
+
+string16 OutdatedPluginInfoBar::GetButtonLabel(InfoBarButton button) const {
+  return l10n_util::GetStringUTF16((button == BUTTON_OK) ?
+      IDS_PLUGIN_UPDATE : IDS_PLUGIN_ENABLE_TEMPORARILY);
+}
+
+bool OutdatedPluginInfoBar::Accept() {
+  UserMetrics::RecordAction(UserMetricsAction("OutdatedPluginInfobar.Update"));
+  tab_contents_->OpenURL(update_url_, GURL(), NEW_FOREGROUND_TAB,
+                         PageTransition::LINK);
+  return false;
+}
+
+bool OutdatedPluginInfoBar::Cancel() {
+  UserMetrics::RecordAction(
+      UserMetricsAction("OutdatedPluginInfobar.AllowThisTime"));
+  CommonCancel();
+  return true;
+}
+
+void OutdatedPluginInfoBar::InfoBarClosed() {
+  UserMetrics::RecordAction(UserMetricsAction("OutdatedPluginInfobar.Closed"));
+  CommonClose();
+}
+
+bool OutdatedPluginInfoBar::LinkClicked(WindowOpenDisposition disposition) {
+  UserMetrics::RecordAction(
+      UserMetricsAction("OutdatedPluginInfobar.LearnMore"));
+  CommonLearnMore(disposition);
+  return false;
+}
+
+}  // namespace
+
+PluginObserver::PluginObserver(TabContents* tab_contents)
+    : tab_contents_(tab_contents) { }
+
+PluginObserver::~PluginObserver() { }
+
+bool PluginObserver::OnMessageReceived(const IPC::Message& message) {
+  IPC_BEGIN_MESSAGE_MAP(PluginObserver, message)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_MissingPluginStatus, OnMissingPluginStatus)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_CrashedPlugin, OnCrashedPlugin)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_BlockedOutdatedPlugin,
+                        OnBlockedOutdatedPlugin)
+    IPC_MESSAGE_UNHANDLED(return false)
+  IPC_END_MESSAGE_MAP()
+
+  return true;
+}
+
+PluginInstallerInfoBarDelegate* PluginObserver::GetPluginInstaller() {
+  if (plugin_installer_.get() == NULL)
+    plugin_installer_.reset(new PluginInstallerInfoBarDelegate(tab_contents_));
+  return plugin_installer_.get();
+}
+
+void PluginObserver::OnMissingPluginStatus(int status) {
+#if defined(OS_WIN)
+// TODO(PORT): pull in when plug-ins work
+  GetPluginInstaller()->OnMissingPluginStatus(status);
+#endif
+}
+
+void PluginObserver::OnCrashedPlugin(const FilePath& plugin_path) {
+  DCHECK(!plugin_path.value().empty());
+
+  std::wstring plugin_name = plugin_path.ToWStringHack();
+  webkit::npapi::WebPluginInfo plugin_info;
+  if (webkit::npapi::PluginList::Singleton()->GetPluginInfoByPath(
+          plugin_path, &plugin_info) &&
+      !plugin_info.name.empty()) {
+    plugin_name = UTF16ToWide(plugin_info.name);
+#if defined(OS_MACOSX)
+    // Many plugins on the Mac have .plugin in the actual name, which looks
+    // terrible, so look for that and strip it off if present.
+    const std::wstring plugin_extension(L".plugin");
+    if (EndsWith(plugin_name, plugin_extension, true))
+      plugin_name.erase(plugin_name.length() - plugin_extension.length());
+#endif  // OS_MACOSX
+  }
+  SkBitmap* crash_icon = ResourceBundle::GetSharedInstance().GetBitmapNamed(
+      IDR_INFOBAR_PLUGIN_CRASHED);
+  tab_contents_->AddInfoBar(new SimpleAlertInfoBarDelegate(
+      tab_contents_, crash_icon,
+      l10n_util::GetStringFUTF16(IDS_PLUGIN_CRASHED_PROMPT,
+                                 WideToUTF16Hack(plugin_name)), true));
+}
+
+void PluginObserver::OnBlockedOutdatedPlugin(const string16& name,
+                                                  const GURL& update_url) {
+  if (!update_url.is_empty())
+    new OutdatedPluginInfoBar(tab_contents_, name, update_url);
+  else
+    new BlockedPluginInfoBar(tab_contents_, name);
+}
+
diff --git a/chrome/browser/plugin_observer.h b/chrome/browser/plugin_observer.h
new file mode 100644
index 0000000..97f0295
--- /dev/null
+++ b/chrome/browser/plugin_observer.h
@@ -0,0 +1,39 @@
+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_PLUGIN_OBSERVER_H_
+#define CHROME_BROWSER_PLUGIN_OBSERVER_H_
+#pragma once
+
+#include "chrome/browser/tab_contents/tab_contents_observer.h"
+
+class FilePath;
+class GURL;
+class PluginInstallerInfoBarDelegate;
+class TabContents;
+
+class PluginObserver : public TabContentsObserver {
+ public:
+  explicit PluginObserver(TabContents* tab_contents);
+  ~PluginObserver();
+
+  // IPC::Channel::Listener implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message);
+
+ private:
+  // Returns the PluginInstallerInfoBarDelegate, creating it if necessary.
+  PluginInstallerInfoBarDelegate* GetPluginInstaller();
+
+  void OnMissingPluginStatus(int status);
+  void OnCrashedPlugin(const FilePath& plugin_path);
+  void OnBlockedOutdatedPlugin(const string16& name, const GURL& update_url);
+
+  TabContents* tab_contents_;  // Weak, owns us.
+  // PluginInstallerInfoBarDelegate, lazily created.
+  scoped_ptr<PluginInstallerInfoBarDelegate> plugin_installer_;
+
+  DISALLOW_COPY_AND_ASSIGN(PluginObserver);
+};
+
+#endif  // CHROME_BROWSER_PLUGIN_OBSERVER_H_
diff --git a/chrome/browser/tab_contents/tab_contents.cc b/chrome/browser/tab_contents/tab_contents.cc
index 536948a..8a941cd 100644
--- a/chrome/browser/tab_contents/tab_contents.cc
+++ b/chrome/browser/tab_contents/tab_contents.cc
@@ -50,7 +50,7 @@
 #include "chrome/browser/omnibox_search_hint.h"
 #include "chrome/browser/pdf_unsupported_feature.h"
 #include "chrome/browser/platform_util.h"
-#include "chrome/browser/plugin_installer_infobar_delegate.h"
+#include "chrome/browser/plugin_observer.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_plt_recorder.h"
@@ -108,7 +108,6 @@
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "webkit/glue/password_form.h"
-#include "webkit/plugins/npapi/plugin_list.h"
 #include "webkit/glue/webpreferences.h"
 
 #if defined(OS_MACOSX)
@@ -250,214 +249,6 @@ void MakeNavigateParams(const NavigationEntry& entry,
   params->request_time = base::Time::Now();
 }
 
-// PluginInfoBar --------------------------------------------------------------
-
-class PluginInfoBar : public ConfirmInfoBarDelegate {
- public:
-  PluginInfoBar(TabContents* tab_contents, const string16& name);
-
-  // ConfirmInfoBarDelegate:
-  virtual void InfoBarClosed() = 0;
-  virtual SkBitmap* GetIcon() const;
-  virtual string16 GetMessageText() const = 0;
-  virtual int GetButtons() const;
-  virtual string16 GetButtonLabel(InfoBarButton button) const = 0;
-  virtual bool Accept() = 0;
-  virtual bool Cancel() = 0;
-  virtual string16 GetLinkText();
-  virtual bool LinkClicked(WindowOpenDisposition disposition) = 0;
-
- protected:
-  virtual ~PluginInfoBar();
-
-  void CommonCancel();
-  void CommonClose();
-  void CommonLearnMore(WindowOpenDisposition disposition);
-
-  string16 name_;
-  TabContents* tab_contents_;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(PluginInfoBar);
-};
-
-PluginInfoBar::PluginInfoBar(TabContents* tab_contents, const string16& name)
-    : ConfirmInfoBarDelegate(tab_contents),
-      name_(name),
-      tab_contents_(tab_contents) {
-}
-
-PluginInfoBar::~PluginInfoBar() {
-}
-
-void PluginInfoBar::CommonClose() {
-  delete this;
-}
-
-SkBitmap* PluginInfoBar::GetIcon() const {
-  return ResourceBundle::GetSharedInstance().GetBitmapNamed(
-      IDR_INFOBAR_PLUGIN_INSTALL);
-}
-
-int PluginInfoBar::GetButtons() const {
-  return BUTTON_OK | BUTTON_CANCEL;
-}
-
-void PluginInfoBar::CommonCancel() {
-  tab_contents_->render_view_host()->LoadBlockedPlugins();
-}
-
-string16 PluginInfoBar::GetLinkText() {
-  return l10n_util::GetStringUTF16(IDS_LEARN_MORE);
-}
-
-void PluginInfoBar::CommonLearnMore(WindowOpenDisposition disposition) {
-  // TODO(bauerb): Navigate to a help page explaining why we disabled
-  // or blocked the plugin, once we have one.
-}
-
-
-// BlockedPluginInfoBar -------------------------------------------------------
-
-class BlockedPluginInfoBar : public PluginInfoBar {
- public:
-  BlockedPluginInfoBar(TabContents* tab_contents,
-                       const string16& name);
-
-  // ConfirmInfoBarDelegate:
-  virtual string16 GetMessageText() const;
-  virtual string16 GetButtonLabel(InfoBarButton button) const;
-  virtual bool Accept();
-  virtual bool Cancel();
-  virtual void InfoBarClosed();
-  virtual bool LinkClicked(WindowOpenDisposition disposition);
-
- protected:
-  virtual ~BlockedPluginInfoBar();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BlockedPluginInfoBar);
-};
-
-BlockedPluginInfoBar::BlockedPluginInfoBar(TabContents* tab_contents,
-                                           const string16& name)
-    : PluginInfoBar(tab_contents, name) {
-  tab_contents->AddInfoBar(this);
-  UserMetrics::RecordAction(UserMetricsAction("BlockedPluginInfobar.Shown"));
-}
-
-BlockedPluginInfoBar::~BlockedPluginInfoBar() {
-}
-
-string16 BlockedPluginInfoBar::GetMessageText() const {
-  return l10n_util::GetStringFUTF16(IDS_PLUGIN_NOT_AUTHORIZED, name_);
-}
-
-string16 BlockedPluginInfoBar::GetButtonLabel(InfoBarButton button) const {
-  return l10n_util::GetStringUTF16((button == BUTTON_OK) ?
-      IDS_PLUGIN_ENABLE_ALWAYS : IDS_PLUGIN_ENABLE_TEMPORARILY);
-}
-
-bool BlockedPluginInfoBar::Accept() {
-  UserMetrics::RecordAction(
-      UserMetricsAction("BlockedPluginInfobar.AlwaysAllow"));
-  tab_contents_->profile()->GetHostContentSettingsMap()->AddExceptionForURL(
-      tab_contents_->GetURL(), CONTENT_SETTINGS_TYPE_PLUGINS, std::string(),
-      CONTENT_SETTING_ALLOW);
-  tab_contents_->render_view_host()->LoadBlockedPlugins();
-  return false;
-}
-
-bool BlockedPluginInfoBar::Cancel() {
-  UserMetrics::RecordAction(
-      UserMetricsAction("BlockedPluginInfobar.AllowThisTime"));
-  CommonCancel();
-  return false;
-}
-
-void BlockedPluginInfoBar::InfoBarClosed() {
-  UserMetrics::RecordAction(UserMetricsAction("BlockedPluginInfobar.Closed"));
-  CommonClose();
-}
-
-bool BlockedPluginInfoBar::LinkClicked(WindowOpenDisposition disposition) {
-  UserMetrics::RecordAction(
-      UserMetricsAction("BlockedPluginInfobar.LearnMore"));
-  CommonLearnMore(disposition);
-  return false;
-}
-
-// OutdatedPluginInfoBar ------------------------------------------------------
-
-class OutdatedPluginInfoBar : public PluginInfoBar {
- public:
-  OutdatedPluginInfoBar(TabContents* tab_contents,
-                        const string16& name,
-                        const GURL& update_url);
-
-  // ConfirmInfoBarDelegate:
-  virtual string16 GetMessageText() const;
-  virtual string16 GetButtonLabel(InfoBarButton button) const;
-  virtual bool Accept();
-  virtual bool Cancel();
-  virtual void InfoBarClosed();
-  virtual bool LinkClicked(WindowOpenDisposition disposition);
-
- protected:
-  virtual ~OutdatedPluginInfoBar();
-
- private:
-  GURL update_url_;
-
-  DISALLOW_COPY_AND_ASSIGN(OutdatedPluginInfoBar);
-};
-
-OutdatedPluginInfoBar::OutdatedPluginInfoBar(TabContents* tab_contents,
-                                             const string16& name,
-                                             const GURL& update_url)
-    : PluginInfoBar(tab_contents, name), update_url_(update_url) {
-  tab_contents->AddInfoBar(this);
-  UserMetrics::RecordAction(UserMetricsAction("OutdatedPluginInfobar.Shown"));
-}
-
-OutdatedPluginInfoBar::~OutdatedPluginInfoBar() {
-}
-
-string16 OutdatedPluginInfoBar::GetMessageText() const {
-  return l10n_util::GetStringFUTF16(IDS_PLUGIN_OUTDATED_PROMPT, name_);
-}
-
-string16 OutdatedPluginInfoBar::GetButtonLabel(InfoBarButton button) const {
-  return l10n_util::GetStringUTF16((button == BUTTON_OK) ?
-      IDS_PLUGIN_UPDATE : IDS_PLUGIN_ENABLE_TEMPORARILY);
-}
-
-bool OutdatedPluginInfoBar::Accept() {
-  UserMetrics::RecordAction(UserMetricsAction("OutdatedPluginInfobar.Update"));
-  tab_contents_->OpenURL(update_url_, GURL(), NEW_FOREGROUND_TAB,
-                         PageTransition::LINK);
-  return false;
-}
-
-bool OutdatedPluginInfoBar::Cancel() {
-  UserMetrics::RecordAction(
-      UserMetricsAction("OutdatedPluginInfobar.AllowThisTime"));
-  CommonCancel();
-  return false;
-}
-
-void OutdatedPluginInfoBar::InfoBarClosed() {
-  UserMetrics::RecordAction(UserMetricsAction("OutdatedPluginInfobar.Closed"));
-  CommonClose();
-}
-
-bool OutdatedPluginInfoBar::LinkClicked(WindowOpenDisposition disposition) {
-  UserMetrics::RecordAction(
-      UserMetricsAction("OutdatedPluginInfobar.LearnMore"));
-  CommonLearnMore(disposition);
-  return false;
-}
-
 }  // namespace
 
 
@@ -485,7 +276,6 @@ TabContents::TabContents(Profile* profile,
       save_package_(),
       autocomplete_history_manager_(),
       autofill_manager_(),
-      plugin_installer_(),
       prerender_plt_recorder_(),
       bookmark_drag_(NULL),
       ALLOW_THIS_IN_INITIALIZER_LIST(fav_icon_helper_(this)),
@@ -599,6 +389,8 @@ TabContents::TabContents(Profile* profile,
   desktop_notification_handler_.reset(
       new DesktopNotificationHandler(this, GetRenderProcessHost()));
   AddObserver(desktop_notification_handler_.get());
+  plugin_observer_.reset(new PluginObserver(this));
+  AddObserver(plugin_observer_.get());
 }
 
 TabContents::~TabContents() {
@@ -748,10 +540,6 @@ bool TabContents::OnMessageReceived(const IPC::Message& message) {
                         OnPDFHasUnsupportedFeature)
     IPC_MESSAGE_HANDLER(ViewHostMsg_Find_Reply, OnFindReply)
     IPC_MESSAGE_HANDLER(ViewHostMsg_GoToEntryAtOffset, OnGoToEntryAtOffset)
-    IPC_MESSAGE_HANDLER(ViewHostMsg_MissingPluginStatus, OnMissingPluginStatus)
-    IPC_MESSAGE_HANDLER(ViewHostMsg_CrashedPlugin, OnCrashedPlugin)
-    IPC_MESSAGE_HANDLER(ViewHostMsg_BlockedOutdatedPlugin,
-                        OnBlockedOutdatedPlugin)
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidGetApplicationInfo,
                         OnDidGetApplicationInfo)
     IPC_MESSAGE_HANDLER(ViewHostMsg_InstallApplication,
@@ -778,12 +566,6 @@ bool TabContents::HostsExtension() const {
   return GetURL().SchemeIs(chrome::kExtensionScheme);
 }
 
-PluginInstallerInfoBarDelegate* TabContents::GetPluginInstaller() {
-  if (plugin_installer_.get() == NULL)
-    plugin_installer_.reset(new PluginInstallerInfoBarDelegate(this));
-  return plugin_installer_.get();
-}
-
 TabContentsSSLHelper* TabContents::GetSSLHelper() {
   if (ssl_helper_.get() == NULL)
     ssl_helper_.reset(new TabContentsSSLHelper(this));
@@ -2443,37 +2225,6 @@ void TabContents::OnGoToEntryAtOffset(int offset) {
   }
 }
 
-void TabContents::OnMissingPluginStatus(int status) {
-#if defined(OS_WIN)
-// TODO(PORT): pull in when plug-ins work
-  GetPluginInstaller()->OnMissingPluginStatus(status);
-#endif
-}
-
-void TabContents::OnCrashedPlugin(const FilePath& plugin_path) {
-  DCHECK(!plugin_path.value().empty());
-
-  std::wstring plugin_name = plugin_path.ToWStringHack();
-  webkit::npapi::WebPluginInfo plugin_info;
-  if (webkit::npapi::PluginList::Singleton()->GetPluginInfoByPath(
-          plugin_path, &plugin_info) &&
-      !plugin_info.name.empty()) {
-    plugin_name = UTF16ToWide(plugin_info.name);
-#if defined(OS_MACOSX)
-    // Many plugins on the Mac have .plugin in the actual name, which looks
-    // terrible, so look for that and strip it off if present.
-    const std::wstring plugin_extension(L".plugin");
-    if (EndsWith(plugin_name, plugin_extension, true))
-      plugin_name.erase(plugin_name.length() - plugin_extension.length());
-#endif  // OS_MACOSX
-  }
-  SkBitmap* crash_icon = ResourceBundle::GetSharedInstance().GetBitmapNamed(
-      IDR_INFOBAR_PLUGIN_CRASHED);
-  AddInfoBar(new SimpleAlertInfoBarDelegate(this, crash_icon,
-      l10n_util::GetStringFUTF16(IDS_PLUGIN_CRASHED_PROMPT,
-                                 WideToUTF16Hack(plugin_name)), true));
-}
-
 void TabContents::OnDidGetApplicationInfo(int32 page_id,
                                           const WebApplicationInfo& info) {
   web_app_info_ = info;
@@ -2487,14 +2238,6 @@ void TabContents::OnInstallApplication(const WebApplicationInfo& info) {
     delegate()->OnInstallApplication(this, info);
 }
 
-void TabContents::OnBlockedOutdatedPlugin(const string16& name,
-                                          const GURL& update_url) {
-  if (!update_url.is_empty())
-    new OutdatedPluginInfoBar(this, name, update_url);
-  else
-    new BlockedPluginInfoBar(this, name);
-}
-
 void TabContents::OnPageContents(const GURL& url,
                                  int32 page_id,
                                  const string16& contents,
diff --git a/chrome/browser/tab_contents/tab_contents.h b/chrome/browser/tab_contents/tab_contents.h
index 3f11028..fa7a6a5 100644
--- a/chrome/browser/tab_contents/tab_contents.h
+++ b/chrome/browser/tab_contents/tab_contents.h
@@ -66,7 +66,7 @@ class FileSelectHelper;
 class InfoBarDelegate;
 class LoadNotificationDetails;
 class OmniboxSearchHint;
-class PluginInstallerInfoBarDelegate;
+class PluginObserver;
 class Profile;
 class PrerenderManager;
 class PrerenderPLTRecorder;
@@ -147,9 +147,6 @@ class TabContents : public PageNavigator,
   // Returns true if contains content rendered by an extension.
   bool HostsExtension() const;
 
-  // Returns the PluginInstallerInfoBarDelegate, creating it if necessary.
-  PluginInstallerInfoBarDelegate* GetPluginInstaller();
-
   // Returns the TabContentsSSLHelper, creating it if necessary.
   TabContentsSSLHelper* GetSSLHelper();
 
@@ -823,11 +820,8 @@ class TabContents : public PageNavigator,
                    int active_match_ordinal,
                    bool final_update);
   void OnGoToEntryAtOffset(int offset);
-  void OnMissingPluginStatus(int status);
-  void OnCrashedPlugin(const FilePath& plugin_path);
   void OnDidGetApplicationInfo(int32 page_id, const WebApplicationInfo& info);
   void OnInstallApplication(const WebApplicationInfo& info);
-  void OnBlockedOutdatedPlugin(const string16& name, const GURL& update_url);
   void OnPageContents(const GURL& url,
                       int32 page_id,
                       const string16& contents,
@@ -1123,8 +1117,8 @@ class TabContents : public PageNavigator,
   // AutoFillManager.
   scoped_ptr<AutoFillManager> autofill_manager_;
 
-  // PluginInstallerInfoBarDelegate, lazily created.
-  scoped_ptr<PluginInstallerInfoBarDelegate> plugin_installer_;
+  // Handles plugin messages.
+  scoped_ptr<PluginObserver> plugin_observer_;
 
   // Prerender PageLoadTime Recorder.
   scoped_ptr<PrerenderPLTRecorder> prerender_plt_recorder_;
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index a134ba9..0dd7f81 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -1989,6 +1989,8 @@
         'browser/plugin_exceptions_table_model.h',
         'browser/plugin_installer_infobar_delegate.cc',
         'browser/plugin_installer_infobar_delegate.h',
+        'browser/plugin_observer.cc',
+        'browser/plugin_observer.h',
         'browser/plugin_process_host.cc',
         'browser/plugin_process_host.h',
         'browser/plugin_process_host_mac.cc',