[WebAPK] Refactor "unsigned sources" installation path

chrome/browser/android/webapk/webapk_installer_unittest.cc

 // 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.
 
 #include "chrome/browser/android/webapk/webapk_installer.h"
 
 #include <jni.h>
 #include <memory>
 #include <string>
 
@@ skipping 48 matching lines @@
 class TestWebApkInstaller : public WebApkInstaller {
  public:
   TestWebApkInstaller(content::BrowserContext* browser_context,
                       const ShortcutInfo& shortcut_info,
                       const SkBitmap& shortcut_icon,
                       bool can_use_google_play_install_service)
       : WebApkInstaller(browser_context, shortcut_info, shortcut_icon),
         can_use_google_play_install_service_(
             can_use_google_play_install_service) {}
 
-  bool StartInstallingDownloadedWebApk(
+  void InstallDownloadedWebApk(
       JNIEnv* env,
       const base::android::ScopedJavaLocalRef<jstring>& file_path,
       const base::android::ScopedJavaLocalRef<jstring>& package_name) override {
     PostTaskToRunSuccessCallback();
-    return true;
   }
 
-  bool StartUpdateUsingDownloadedWebApk(
+  void UpdateUsingDownloadedWebApk(
       JNIEnv* env,
       const base::android::ScopedJavaLocalRef<jstring>& file_path) override {
-    return true;
+    PostTaskToRunSuccessCallback();
   }
 
   bool CanUseGooglePlayInstallService() override {
     return can_use_google_play_install_service_;
   }
 
   void InstallOrUpdateWebApkFromGooglePlay(const std::string& package_name,
                                            int version,
                                            const std::string& token) override {
     PostTaskToRunSuccessCallback();
@@ skipping 418 matching lines @@
     icons[i] = manifest.icons(i);
 
   EXPECT_EQ(best_primary_icon_url.spec(), icons[0].src());
   EXPECT_EQ(best_primary_icon_murmur2_hash, icons[0].hash());
   EXPECT_TRUE(icons[0].has_image_data());
 
   EXPECT_EQ(icon_url_1.spec(), icons[1].src());
   EXPECT_EQ(icon_murmur2_hash_1, icons[1].hash());
   EXPECT_FALSE(icons[1].has_image_data());
 }