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>
+#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.
 class ShortcutHelper {
  public:
+  using WebApkInfoCallback =
+      base::Callback<void(const std::vector<WebApkInfo>&)>;
+
   // Registers JNI hooks.
   static bool RegisterShortcutHelper(JNIEnv* env);
 
   // Adds a shortcut to the launcher using a SkBitmap. The type of shortcut
   // added depends on the properties in |info|. Calls one of
   // InstallWebApkInBackgroundWithSkBitmap, AddWebappInBackgroundWithSkBitmap,
   // or AddShortcutInBackgroundWithSkBitmap.
   static void AddToLauncherWithSkBitmap(
       content::BrowserContext* browser_context,
       const ShortcutInfo& info,
@@ skipping 75 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 RetrieveWebApks(const WebApkInfoCallback& callback);
+
  private:
   ShortcutHelper() = delete;
   ~ShortcutHelper() = delete;
 
   DISALLOW_COPY_AND_ASSIGN(ShortcutHelper);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_SHORTCUT_HELPER_H_