Update of the extension install UI:

chrome/browser/extensions/extension_install_ui.cc

 // Copyright (c) 2009 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/extensions/extension_install_ui.h"
 
 #include <map>
 
 #include "app/l10n_util.h"
 #include "base/file_util.h"
 #include "chrome/browser/browser_list.h"
 #include "chrome/browser/browser_window.h"
 #include "chrome/browser/extensions/theme_preview_infobar_delegate.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/tab_contents/tab_contents.h"
 #include "chrome/common/extensions/extension.h"
 #include "grit/chromium_strings.h"
+#include "grit/generated_resources.h"
 
 #if defined(OS_WIN)
 #include "app/win_util.h"
 #elif defined(OS_MACOSX)
 #include "base/scoped_cftyperef.h"
 #include "base/sys_string_conversions.h"
 #include <CoreFoundation/CFUserNotification.h>
 #endif
 
+namespace {
+
+static std::wstring GetInstallWarning(Extension* extension) {
+  // If the extension has a plugin, it's easy: the plugin has the most severe
+  // warning.
+  if (!extension->plugins().empty())
+    return l10n_util::GetString(IDS_EXTENSION_PROMPT_WARNING_NEW_FULL_ACCESS);
+
+  // Otherwise, we go in descending order of severity: all hosts, several hosts,
+  // a single host, no hosts. For each of these, we also have a variation of the
+  // message for when api permissions are also requested.
+  if (extension->HasAccessToAllHosts()) {
+    if (extension->api_permissions().empty())
+      return l10n_util::GetString(IDS_EXTENSION_PROMPT_WARNING_NEW_ALL_HOSTS);
+    else
+      return l10n_util::GetString(
+          IDS_EXTENSION_PROMPT_WARNING_NEW_ALL_HOSTS_AND_BROWSER);
+  }
+
+  const std::set<std::string> hosts = extension->GetEffectiveHostPermissions();
+  if (hosts.size() > 1) {
+    if (extension->api_permissions().empty())
+      return l10n_util::GetString(
+          IDS_EXTENSION_PROMPT_WARNING_NEW_MULTIPLE_HOSTS);
+    else
+      return l10n_util::GetString(
+          IDS_EXTENSION_PROMPT_WARNING_NEW_MULTIPLE_HOSTS_AND_BROWSER);
+  }
+
+  if (hosts.size() == 1) {
+    if (extension->api_permissions().empty())
+      return l10n_util::GetStringF(
+          IDS_EXTENSION_PROMPT_WARNING_NEW_SINGLE_HOST,
+          UTF8ToWide(*hosts.begin()));
+    else
+      return l10n_util::GetStringF(
+          IDS_EXTENSION_PROMPT_WARNING_NEW_SINGLE_HOST_AND_BROWSER,
+          UTF8ToWide(*hosts.begin()));
+  }
+
+  DCHECK(hosts.size() == 0);
+  if (extension->api_permissions().empty())
+    return L"";
+  else
+    return l10n_util::GetString(IDS_EXTENSION_PROMPT_WARNING_NEW_BROWSER);
+}
+
+}
+
 ExtensionInstallUI::ExtensionInstallUI(Profile* profile)
     : profile_(profile), ui_loop_(MessageLoop::current()) {
 }
 
 void ExtensionInstallUI::ConfirmInstall(Delegate* delegate,
                                         Extension* extension,
                                         SkBitmap* install_icon) {
   DCHECK(ui_loop_ == MessageLoop::current());
 
   // We special-case themes to not show any confirm UI. Instead they are
   // immediately installed, and then we show an infobar (see OnInstallSuccess)
   // to allow the user to revert if they don't like it.
   if (extension->IsTheme()) {
     // Remember the current theme in case the user pressed undo.
     Extension* previous_theme = profile_->GetTheme();
     if (previous_theme)
       previous_theme_id_ = previous_theme->id();
 
     delegate->ContinueInstall();
     return;
   }
 
 #if defined(OS_WIN)
-  ShowExtensionInstallPrompt(profile_, delegate, extension, install_icon);
+  ShowExtensionInstallPrompt(profile_, delegate, extension, install_icon,
+                             GetInstallWarning(extension));
 
 #elif defined(OS_MACOSX)
   // TODO(port): Implement nicer UI.
   // Using CoreFoundation to do this dialog is unimaginably lame but will do
   // until the UI is redone.
   scoped_cftyperef<CFStringRef> product_name(
       base::SysWideToCFStringRef(l10n_util::GetString(IDS_PRODUCT_NAME)));
   CFOptionFlags response;
   if (kCFUserNotificationAlternateResponse == CFUserNotificationDisplayAlert(
       0, kCFUserNotificationCautionAlertLevel, NULL, NULL, NULL,
@@ skipping 68 matching lines @@
 
   // Then either replace that old one or add a new one.
   InfoBarDelegate* new_delegate = new ThemePreviewInfobarDelegate(tab_contents,
       new_theme->name(), previous_theme_id_);
 
   if (old_delegate)
     tab_contents->ReplaceInfoBar(old_delegate, new_delegate);
   else
     tab_contents->AddInfoBar(new_delegate);
 }