Don't block InstallableManager::GetData calls when waiting for a service worker.

chrome/browser/installable/installable_manager.h

 // Copyright 2016 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_INSTALLABLE_INSTALLABLE_MANAGER_H_
 #define CHROME_BROWSER_INSTALLABLE_INSTALLABLE_MANAGER_H_
 
 #include <map>
 #include <memory>
 #include <tuple>
@@ skipping 176 matching lines @@
 
   // Returns the error code associated with the resources requested in |params|,
   // or NO_ERROR_DETECTED if there is no error.
   InstallableStatusCode GetErrorCode(const InstallableParams& params);
 
   // Gets/sets parts of particular properties. Exposed for testing.
   InstallableStatusCode manifest_error() const;
   InstallableStatusCode valid_manifest_error() const;
   void set_valid_manifest_error(InstallableStatusCode error_code);
   InstallableStatusCode worker_error() const;
-  bool worker_waiting() const;
   InstallableStatusCode icon_error(const IconParams& icon_params);
   GURL& icon_url(const IconParams& icon_params);
   const SkBitmap* icon(const IconParams& icon);
 
   // Returns the WebContents to which this object is attached, or nullptr if the
   // WebContents doesn't exist or is currently being destroyed.
   content::WebContents* GetWebContents();
 
   // Returns true if |params| requires no more work to be done.
   bool IsComplete(const InstallableParams& params) const;
@@ skipping 34 matching lines @@
   void DidFinishNavigation(content::NavigationHandle* handle) override;
   void WebContentsDestroyed() override;
 
   const GURL& manifest_url() const;
   const content::Manifest& manifest() const;
   bool is_installable() const;
 
   // The list of <params, callback> pairs that have come from a call to GetData.
   std::vector<Task> tasks_;
 
+  // Tasks which are waiting indefinitely for a service worker to be detected.
+  std::vector<Task> paused_tasks_;
+
   // Installable properties cached on this object.
   std::unique_ptr<ManifestProperty> manifest_;
   std::unique_ptr<ValidManifestProperty> valid_manifest_;
   std::unique_ptr<ServiceWorkerProperty> worker_;
   std::map<IconParams, IconProperty> icons_;
 
   // Owned by the storage partition attached to the content::WebContents which
   // this object is scoped to.
   content::ServiceWorkerContext* service_worker_context_;
 
@@ skipping 10 matching lines @@
 
   bool is_active_;
   bool is_pwa_check_complete_;
 
   base::WeakPtrFactory<InstallableManager> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(InstallableManager);
 };
 
 #endif  // CHROME_BROWSER_INSTALLABLE_INSTALLABLE_MANAGER_H_