[Extensions] Remove the prompt to re-enable app when visiting its site

chrome/browser/extensions/navigation_observer.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/extensions/navigation_observer.h"
-
-#include "base/memory/ptr_util.h"
-#include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/profiles/profile.h"
-#include "content/public/browser/navigation_controller.h"
-#include "content/public/browser/navigation_entry.h"
-#include "content/public/browser/notification_service.h"
-#include "content/public/browser/notification_types.h"
-#include "extensions/browser/extension_prefs.h"
-#include "extensions/browser/extension_registry.h"
-#include "extensions/browser/extension_system.h"
-
-using content::NavigationController;
-using content::NavigationEntry;
-
-namespace extensions {
-
-NavigationObserver::NavigationObserver(Profile* profile)
-    : profile_(profile),
-      extension_registry_observer_(this),
-      weak_factory_(this) {
-  RegisterForNotifications();
-  extension_registry_observer_.Add(ExtensionRegistry::Get(profile));
-}
-
-NavigationObserver::~NavigationObserver() {}
-
-void NavigationObserver::Observe(int type,
-                                 const content::NotificationSource& source,
-                                 const content::NotificationDetails& details) {
-  DCHECK_EQ(content::NOTIFICATION_NAV_ENTRY_COMMITTED, type);
-
-  NavigationController* controller =
-      content::Source<NavigationController>(source).ptr();
-  if (!profile_->IsSameProfile(
-          Profile::FromBrowserContext(controller->GetBrowserContext())))
-    return;
-
-  PromptToEnableExtensionIfNecessary(controller);
-}
-
-void NavigationObserver::RegisterForNotifications() {
-  registrar_.Add(this, content::NOTIFICATION_NAV_ENTRY_COMMITTED,
-                 content::NotificationService::AllSources());
-}
-
-void NavigationObserver::PromptToEnableExtensionIfNecessary(
-    NavigationController* nav_controller) {
-  // Bail out if we're already running a prompt.
-  if (!in_progress_prompt_extension_id_.empty())
-    return;
-
-  NavigationEntry* nav_entry = nav_controller->GetVisibleEntry();
-  if (!nav_entry)
-    return;
-
-  ExtensionRegistry* registry = extensions::ExtensionRegistry::Get(profile_);
-  const Extension* extension =
-      registry->disabled_extensions().GetExtensionOrAppByURL(
-          nav_entry->GetURL());
-  if (!extension)
-    return;
-
-  // Try not to repeatedly prompt the user about the same extension.
-  if (prompted_extensions_.find(extension->id()) != prompted_extensions_.end())
-    return;
-  prompted_extensions_.insert(extension->id());
-
-  ExtensionPrefs* extension_prefs = ExtensionPrefs::Get(profile_);
-  if (extension_prefs->DidExtensionEscalatePermissions(extension->id())) {

[lazyboy, 2017/01/11 00:33:30]

So the re-enable prompt we were thinking of probably is this one:
if extension A is disabled due to permission increase, then navigating to its
resource through omnibox shows this re-enable prompt (I just double checked). So
we will lose that with this CL.

Not sure there's any value in keeping this behavior. But I just wanted to make
sure we are aware of that if we are removing it.
Otherwise, replace the GetExtensionOrAppByURL call above to just use
nav_entry->GetURL()->host() as extension ID. And add a TODO with a bug to
consider removing that as well.

[Devlin, 2017/01/12 17:25:44]

Ah, you're quite right.  Let's keep it for chrome-extension urls.  Sadly, this
meant a lot more work, since now I actually have to test it :P

-    // Keep track of the extension id and nav controller we're prompting for.
-    // These must be reset in OnInstallPromptDone.
-    in_progress_prompt_extension_id_ = extension->id();
-    in_progress_prompt_navigation_controller_ = nav_controller;
-
-    extension_install_prompt_.reset(
-        new ExtensionInstallPrompt(nav_controller->GetWebContents()));
-    ExtensionInstallPrompt::PromptType type =
-        ExtensionInstallPrompt::GetReEnablePromptTypeForExtension(profile_,
-                                                                  extension);
-    extension_install_prompt_->ShowDialog(
-        base::Bind(&NavigationObserver::OnInstallPromptDone,
-                   weak_factory_.GetWeakPtr()),
-        extension, nullptr,
-        base::MakeUnique<ExtensionInstallPrompt::Prompt>(type),
-        ExtensionInstallPrompt::GetDefaultShowDialogCallback());
-  }
-}
-
-void NavigationObserver::OnInstallPromptDone(
-    ExtensionInstallPrompt::Result result) {
-  // The extension was already uninstalled.
-  if (in_progress_prompt_extension_id_.empty())
-    return;
-
-  ExtensionService* extension_service =
-      extensions::ExtensionSystem::Get(profile_)->extension_service();
-  const Extension* extension = extension_service->GetExtensionById(
-      in_progress_prompt_extension_id_, true);
-  CHECK(extension);
-
-  if (result == ExtensionInstallPrompt::Result::ACCEPTED) {
-    NavigationController* nav_controller =
-        in_progress_prompt_navigation_controller_;
-    CHECK(nav_controller);
-
-    // Grant permissions, re-enable the extension, and then reload the tab.
-    extension_service->GrantPermissionsAndEnableExtension(extension);
-    nav_controller->Reload(content::ReloadType::NORMAL, true);
-  } else {
-    std::string histogram_name =
-       result == ExtensionInstallPrompt::Result::USER_CANCELED
-            ? "ReEnableCancel"
-            : "ReEnableAbort";
-    ExtensionService::RecordPermissionMessagesHistogram(extension,
-                                                        histogram_name.c_str());
-  }
-
-  in_progress_prompt_extension_id_ = std::string();
-  in_progress_prompt_navigation_controller_ = nullptr;
-  extension_install_prompt_.reset();
-}
-
-void NavigationObserver::OnExtensionUninstalled(
-    content::BrowserContext* browser_context,
-    const Extension* extension,
-    UninstallReason reason) {
-  if (in_progress_prompt_extension_id_.empty() ||
-      in_progress_prompt_extension_id_ != extension->id()) {
-    return;
-  }
-
-  in_progress_prompt_extension_id_ = std::string();
-  in_progress_prompt_navigation_controller_ = nullptr;
-  extension_install_prompt_.reset();
-}
-
-}  // namespace extensions