Add a link (to view Permissions) to the Extension details on chrome://extensions.

chrome/browser/ui/webui/extensions/extension_settings_handler.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 "chrome/browser/ui/webui/extensions/extension_settings_handler.h"
 
 #include "base/auto_reset.h"
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 282 matching lines @@
   source->AddString("extensionSettingsReloadTerminated",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_RELOAD_TERMINATED));
   source->AddString("extensionSettingsLaunch",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_LAUNCH));
   source->AddString("extensionSettingsRestart",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_RESTART));
   source->AddString("extensionSettingsReloadUnpacked",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_RELOAD_UNPACKED));
   source->AddString("extensionSettingsOptions",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_OPTIONS_LINK));
+  source->AddString("extensionSettingsPermissions",
+      l10n_util::GetStringUTF16(IDS_EXTENSIONS_PERMISSIONS_LINK));
   source->AddString("extensionSettingsActivity",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_ACTIVITY_LINK));
   source->AddString("extensionSettingsVisitWebsite",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_VISIT_WEBSITE));
   source->AddString("extensionSettingsVisitWebStore",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_VISIT_WEBSTORE));
   source->AddString("extensionSettingsPolicyControlled",
      l10n_util::GetStringUTF16(IDS_EXTENSIONS_POLICY_CONTROLLED));
   source->AddString("extensionSettingsManagedMode",
      l10n_util::GetStringUTF16(IDS_EXTENSIONS_LOCKED_MANAGED_MODE));
@@ skipping 74 matching lines @@
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("extensionSettingsAllowFileAccess",
       base::Bind(&ExtensionSettingsHandler::HandleAllowFileAccessMessage,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("extensionSettingsUninstall",
       base::Bind(&ExtensionSettingsHandler::HandleUninstallMessage,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("extensionSettingsOptions",
       base::Bind(&ExtensionSettingsHandler::HandleOptionsMessage,
                  base::Unretained(this)));
+  web_ui()->RegisterMessageCallback("extensionSettingsPermissions",
+      base::Bind(&ExtensionSettingsHandler::HandlePermissionsMessage,
+                 base::Unretained(this)));
   web_ui()->RegisterMessageCallback("extensionSettingsShowButton",
       base::Bind(&ExtensionSettingsHandler::HandleShowButtonMessage,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("extensionSettingsAutoupdate",
       base::Bind(&ExtensionSettingsHandler::HandleAutoUpdateMessage,
                  base::Unretained(this)));
   web_ui()->RegisterMessageCallback("extensionSettingsLoadUnpackedExtension",
       base::Bind(&ExtensionSettingsHandler::HandleLoadUnpackedExtensionMessage,
                  base::Unretained(this)));
 }
@@ skipping 87 matching lines @@
 }
 
 void ExtensionSettingsHandler::ExtensionUninstallCanceled() {
   extension_id_prompting_ = "";
 }
 
 void ExtensionSettingsHandler::ExtensionWarningsChanged() {
   MaybeUpdateAfterNotification();
 }
 
+void ExtensionSettingsHandler::InstallUIProceed() {
+  // This should never happen. The dialog only has a cancel button.
+  NOTREACHED();
+}
+
+void ExtensionSettingsHandler::InstallUIAbort(bool user_initiated) {
+}
+
 void ExtensionSettingsHandler::ReloadUnpackedExtensions() {
   const ExtensionSet* extensions = extension_service_->extensions();
   std::vector<const Extension*> unpacked_extensions;
   for (ExtensionSet::const_iterator extension = extensions->begin();
        extension != extensions->end(); ++extension) {
     if ((*extension)->location() == Extension::LOAD)
       unpacked_extensions.push_back(*extension);
   }
 
   for (std::vector<const Extension*>::iterator iter =
@@ skipping 273 matching lines @@
 void ExtensionSettingsHandler::HandleOptionsMessage(const ListValue* args) {
   const Extension* extension = GetActiveExtension(args);
   if (!extension ||
       extensions::ManifestURL::GetOptionsPage(extension).is_empty())
     return;
   extensions::ExtensionSystem::Get(Profile::FromWebUI(web_ui()))->
       process_manager()->OpenOptionsPage(extension,
           chrome::FindBrowserWithWebContents(web_ui()->GetWebContents()));
 }
 
+void ExtensionSettingsHandler::HandlePermissionsMessage(const ListValue* args) {
+  std::string extension_id(UTF16ToUTF8(ExtractStringValue(args)));
+  CHECK(!extension_id.empty());
+  const Extension* extension =
+      extension_service_->GetExtensionById(extension_id, true);
+  if (!extension)
+    return;
+
+  prompt_.reset(new ExtensionInstallPrompt(web_contents()));
+  prompt_->ReviewPermissions(this, extension);
+}
+
 void ExtensionSettingsHandler::HandleShowButtonMessage(const ListValue* args) {
   const Extension* extension = GetActiveExtension(args);
   if (!extension)
     return;
   extension_service_->extension_prefs()->
       SetBrowserActionVisibility(extension, true);
 }
 
 void ExtensionSettingsHandler::HandleAutoUpdateMessage(const ListValue* args) {
   ExtensionUpdater* updater = extension_service_->updater();
@@ skipping 200 matching lines @@
     std::vector<std::string> requirement_errors) {
   if (requirement_errors.empty()) {
     extension_service_->EnableExtension(extension_id);
   } else {
     ExtensionErrorReporter::GetInstance()->ReportError(
         UTF8ToUTF16(JoinString(requirement_errors, ' ')),
         true /* be noisy */);
   }
   requirements_checker_.reset();
 }