Make AppBannerInfoBar install WebAPK.

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(const ShortcutInfo& shortcut_info,
                       const SkBitmap& shortcut_icon)
       : WebApkInstaller(shortcut_info, shortcut_icon) {}
 
   bool StartInstallingDownloadedWebApk(
       JNIEnv* env,
       const base::android::ScopedJavaLocalRef<jstring>& file_path,
       const base::android::ScopedJavaLocalRef<jstring>& package_name) override {
+    OnSuccess();

[gone, 2016/08/29 17:24:09]

This isn't exactly like the code flow it's testing because this calls
OnSuccess() immediately, while the other one is asynchronous.  Can you post a
task to run after it returns from this function?

[Xi Han, 2016/08/29 17:55:46]

Done.

     return true;
   }
 
   bool StartUpdateUsingDownloadedWebApk(
       JNIEnv* env,
       const base::android::ScopedJavaLocalRef<jstring>& file_path,
       const base::android::ScopedJavaLocalRef<jstring>& package_name) override {
+    OnSuccess();
     return true;
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestWebApkInstaller);
 };
 
 // Runs the WebApkInstaller installation process/update and blocks till done.
 class WebApkInstallerRunner {
  public:
@@ skipping 41 matching lines @@
 
   void Run() {
     base::RunLoop run_loop;
     on_completed_callback_ = run_loop.QuitClosure();
     run_loop.Run();
   }
 
   bool success() { return success_; }
 
  private:
-  void OnCompleted(bool success) {
+  void OnCompleted(bool success, const std::string& webapk_package) {
     success_ = success;
     on_completed_callback_.Run();
   }
 
   scoped_refptr<net::TestURLRequestContextGetter>
       url_request_context_getter_;
 
   // The Web Manifest's icon URL.
   const GURL icon_url_;
 
@@ skipping 185 matching lines @@
   runner->RunInstallWebApk();
   EXPECT_FALSE(runner->success());
 }
 
 // Test update succeeding.
 TEST_F(WebApkInstallerTest, UpdateSuccess) {
   std::unique_ptr<WebApkInstallerRunner> runner = CreateWebApkInstallerRunner();
   runner->RunUpdateWebApk();
   EXPECT_TRUE(runner->success());
 }