[WebAPK] Refactor "unsigned sources" installation path

chrome/browser/android/webapk/webapk_installer.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_ANDROID_WEBAPK_WEBAPK_INSTALLER_H_
 #define CHROME_BROWSER_ANDROID_WEBAPK_WEBAPK_INSTALLER_H_
 
 #include <jni.h>
 #include <map>
 #include <memory>
@@ skipping 92 matching lines @@
       bool is_manifest_stale);
 
   // Registers JNI hooks.
   static bool Register(JNIEnv* env);
 
  protected:
   WebApkInstaller(content::BrowserContext* browser_context,
                   const ShortcutInfo& shortcut_info,
                   const SkBitmap& shortcut_icon);
 
-  // Starts installation of the downloaded WebAPK. Returns whether the install
-  // could be started. The installation may still fail if true is returned.
+  // Starts installion of the downloaded WebAPK.
   // |file_path| is the file path that the WebAPK was downloaded to.
-  // |package_name| is the package name that the WebAPK should be installed at.
-  virtual bool StartInstallingDownloadedWebApk(
+  // |package_name| is the package name of the WebAPK.
+  virtual void InstallDownloadedWebApk(
       JNIEnv* env,
       const base::android::ScopedJavaLocalRef<jstring>& java_file_path,
       const base::android::ScopedJavaLocalRef<jstring>& java_package_name);
 
-  // Starts update using the downloaded WebAPK. Returns whether the updating
-  // could be started. The updating may still fail if true is returned.
+  // Starts update using the downloaded WebAPK.
   // |file_path| is the file path that the WebAPK was downloaded to.
-  virtual bool StartUpdateUsingDownloadedWebApk(
+  virtual void UpdateUsingDownloadedWebApk(
       JNIEnv* env,
       const base::android::ScopedJavaLocalRef<jstring>& java_file_path);
 
   // Returns whether Google Play Services can be used and the install delegate
   // is available.
   // Note: it is possible that this delegate is null even when installing
   // WebAPKs using Google Play is enabled.
   virtual bool CanUseGooglePlayInstallService();
 
   // Called when the package name of the WebAPK is available and the install
@@ skipping 148 matching lines @@
   // Points to the Java Object.
   base::android::ScopedJavaGlobalRef<jobject> java_ref_;
 
   // Used to get |weak_ptr_|.
   base::WeakPtrFactory<WebApkInstaller> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebApkInstaller);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_WEBAPK_WEBAPK_INSTALLER_H_