Fall back to shortcut A2HS when Phonesky is out of date or unavailable.

chrome/browser/android/webapps/add_to_homescreen_manager.cc

 // Copyright 2015 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/android/webapps/add_to_homescreen_manager.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/guid.h"
 #include "base/location.h"
@@ skipping 61 matching lines @@
     // via OnDataAvailable();
     AddShortcut(data_fetcher_->shortcut_info(), data_fetcher_->primary_icon());
   }
 }
 
 void AddToHomescreenManager::Start(content::WebContents* web_contents) {
   bool check_webapk_compatible = false;
   if (ChromeWebApkHost::AreWebApkEnabled() &&
       InstallableManager::IsContentSecure(web_contents)) {
     check_webapk_compatible = true;
-  } else {
+    if (ChromeWebApkHost::CanUseGooglePlayToInstallWebApk()) {
+      // It is possible that the Google Play Install API isn't available when
+      // Google Play install is enabled. In that case, we fallback to classic
+      // add-to-homescreen shortcut flow.
+      ChromeWebApkHost::CanUseGooglePlayInstallApiCallback callback
+          = base::Bind(&AddToHomescreenManager::OnCanUseGooglePlayInstallApi,
+                       base::Unretained(this),
+                       web_contents, check_webapk_compatible);
+      ChromeWebApkHost::CanUseGooglePlayInstallApi(callback);
+      return;
+    }
+  }
+
+  StartImpl(web_contents, check_webapk_compatible, true);
+}
+
+void AddToHomescreenManager::StartImpl(content::WebContents* web_contents,
+                                       bool check_webapk_compatible,
+                                       bool can_use_webapk_install_flow) {
+  if (!check_webapk_compatible)
     ShowDialog();
-  }
 
   data_fetcher_ = new AddToHomescreenDataFetcher(
       web_contents, ShortcutHelper::GetIdealHomescreenIconSizeInPx(),
       ShortcutHelper::GetMinimumHomescreenIconSizeInPx(),
       ShortcutHelper::GetIdealSplashImageSizeInPx(),
       ShortcutHelper::GetMinimumSplashImageSizeInPx(),
       ShortcutHelper::GetIdealBadgeIconSizeInPx(),
-      check_webapk_compatible, this);
+      check_webapk_compatible, can_use_webapk_install_flow, this);
 }
 
 AddToHomescreenManager::~AddToHomescreenManager() {
   if (data_fetcher_) {
     data_fetcher_->set_weak_observer(nullptr);
     data_fetcher_ = nullptr;
   }
 }
 
+void AddToHomescreenManager::OnCanUseGooglePlayInstallApi(
+    content::WebContents* web_contents,
+    bool check_webapk_compatible,
+    bool isAvailable) {
+  StartImpl(web_contents, check_webapk_compatible, isAvailable);
+}
+
 void AddToHomescreenManager::ShowDialog() {
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_AddToHomescreenManager_showDialog(env, java_ref_);
 }
 
 void AddToHomescreenManager::AddShortcut(const ShortcutInfo& info,
                                          const SkBitmap& icon) {
   DCHECK(add_shortcut_pending_);
   if (!add_shortcut_pending_)
     return;
@@ skipping 75 matching lines @@
 
   if (add_shortcut_pending_)
     AddShortcut(info, primary_icon);
 }
 
 void AddToHomescreenManager::CreateInfoBarForWebApk(const ShortcutInfo& info,
                                                     const SkBitmap& icon) {
   banners::AppBannerInfoBarDelegateAndroid::Create(
       data_fetcher_->web_contents(), nullptr, info.user_title,
       base::MakeUnique<ShortcutInfo>(info), base::MakeUnique<SkBitmap>(icon),
-      -1 /* event_request_id */, webapk::INSTALL_SOURCE_MENU);
+      -1 /* event_request_id */, true /* can_use_webapk_install_flow */,
+      webapk::INSTALL_SOURCE_MENU);
 }
 
 SkBitmap AddToHomescreenManager::FinalizeLauncherIconInBackground(
     const SkBitmap& bitmap,
     const GURL& url,
     bool* is_generated) {
   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
 
   return ShortcutHelper::FinalizeLauncherIconInBackground(bitmap, url,
                                                           is_generated);
 }