Add a chrome://webapks page.

chrome/browser/android/shortcut_helper.h

 // Copyright 2013 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_SHORTCUT_HELPER_H_
 #define CHROME_BROWSER_ANDROID_SHORTCUT_HELPER_H_
 
+#include <string>

[pkotwicz, 2017/01/18 02:08:21]

Nit: This include is unnecessary

[gonzalon, 2017/01/18 15:29:32]

I think that's because it's being indirectly included from the other imports,
unless there's some Google-specific thing I'm not accounting for. This class
makes use of std::string directly, so I think it should  have the corresponding
include. Anyways, I removed it since I may not be aware of some Google
convention.

[pkotwicz, 2017/01/19 19:37:16]

Yes, you are right. I does use std::string so it should have the include

+#include <vector>
+
 #include "base/android/jni_android.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "chrome/browser/android/shortcut_info.h"
+#include "chrome/browser/android/webapk/webapk_info.h"
 #include "chrome/browser/android/webapk/webapk_installer.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 namespace content {
 class BrowserContext;
 class WebContents;
 }  // namespace content
 
 // ShortcutHelper is the C++ counterpart of org.chromium.chrome.browser's
 // ShortcutHelper in Java.
@@ skipping 84 matching lines @@
   // Returns true if WebAPKs are enabled and there is an installed WebAPK which
   // can handle |start_url|, or there is one is being installed.
   static bool IsWebApkInstalled(content::BrowserContext* browser_context,
                                 const GURL& start_url,
                                 const GURL& manifest_url);
 
   // Generates a scope URL based on the passed in |url|. It should be used
   // when the Web Manifest does not specify a scope URL.
   static GURL GetScopeFromURL(const GURL& url);
 
+  // Fetches information on all the WebAPKs installed on the device and returns
+  // the info to the |callback|.
+  static void ListWebApks(JNIEnv* env,
+      const base::Callback<void(std::vector<WebApkInfo*>)>& callback);

[pkotwicz, 2017/01/18 02:08:21]

You should typedef to make your life easier

typedeffing callbacks is super common in Chromium

[gonzalon, 2017/01/18 15:29:32]

Done.

+
  private:
   ShortcutHelper() = delete;
   ~ShortcutHelper() = delete;
 
   DISALLOW_COPY_AND_ASSIGN(ShortcutHelper);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_SHORTCUT_HELPER_H_