Skip installation process if WebAPK is already installed.

chrome/android/java/src/org/chromium/chrome/browser/ShortcutHelper.java

 // 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.
 
 package org.chromium.chrome.browser;
 
 import android.app.ActivityManager;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ApplicationInfo;
@@ skipping 437 matching lines @@
         RoundedIconGenerator generator = new RoundedIconGenerator(
                 innerSize, innerSize, cornerRadius, color, fontSize);
         Bitmap icon = generator.generateIconForUrl(url);
         if (icon == null) return null; // Bookmark URL does not have a domain.
         canvas.drawBitmap(icon, padding, padding, null);
 
         return bitmap;
     }
 
     /**
-     * Returns true if WebAPKs are enabled and there is a WebAPK installed which can handle
+     * Returns the package name of the WebAPK if WebAPKs are enabled and there is an installed
+     * WebAPK which can handle {@link url}. Returns null otherwise.
+     */
+    @CalledByNative
+    private static String queryWebApkPackage(String url) {
+        if (!ChromeWebApkHost.isEnabled()) return null;
+        return WebApkValidator.queryWebApkPackage(ContextUtils.getApplicationContext(), url);
+    }
+
+    /**
+     * Returns true if WebAPKs are enabled and there is an installed WebAPK which can handle
      * {@link url}.
      */
     @CalledByNative
     private static boolean isWebApkInstalled(String url) {
-        if (!ChromeWebApkHost.isEnabled()) {
-            return false;
-        }
-        return WebApkValidator.queryWebApkPackage(ContextUtils.getApplicationContext(), url)
-                != null;
+        return queryWebApkPackage(url) != null;
     }
 
     /**
      * Compresses a bitmap into a PNG and converts into a Base64 encoded string.
      * The encoded string can be decoded using {@link decodeBitmapFromString(String)}.
      * @param bitmap The Bitmap to compress and encode.
      * @return the String encoding the Bitmap.
      */
     public static String encodeBitmapAsString(Bitmap bitmap) {
         if (bitmap == null) return "";
@@ skipping 148 matching lines @@
         if (drawable instanceof BitmapDrawable) {
             BitmapDrawable bd = (BitmapDrawable) drawable;
             return bd.getBitmap();
         }
         assert false : "The drawable was not a bitmap drawable as expected";
         return null;
     }
 
     private static native void nativeOnWebappDataStored(long callbackPointer);
 }