Upstream: Launch WebAPK without showing intent picker when user taps link in WebAPK scope

chrome/android/java/src/org/chromium/chrome/browser/externalnav/ExternalNavigationHandler.java

 // Copyright 2015 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.externalnav;
 
 import android.content.ActivityNotFoundException;
 import android.content.ComponentName;
 import android.content.Intent;
 import android.content.pm.ResolveInfo;
@@ skipping 329 matching lines @@
 
         if (params.getReferrerUrl() != null) {
             IntentHandler.setPendingReferrer(intent, params.getReferrerUrl());
         }
 
         // Make sure webkit can handle it internally before checking for specialized
         // handlers. If webkit can't handle it internally, we need to call
         // startActivityIfNeeded or startActivity.
         if (!isExternalProtocol) {
             if (!mDelegate.isSpecializedHandlerAvailable(resolvingInfos)) {
-                if (params.isWebApk()) {
+                if (params.webApkPackageName() != null) {
                     intent.setPackage(mDelegate.getPackageName());
                     mDelegate.startActivity(intent);
                     return OverrideUrlLoadingResult.OVERRIDE_WITH_EXTERNAL_INTENT;
                 }
                 return OverrideUrlLoadingResult.NO_OVERRIDE;
             } else if (params.getReferrerUrl() != null && (isLink || isFormSubmit)) {
                 // Current URL has at least one specialized handler available. For navigations
                 // within the same host, keep the navigation inside the browser unless the set of
                 // available apps to handle the new navigation is different. http://crbug.com/463138
                 URI currentUri;
@@ skipping 44 matching lines @@
                             && !params.getRedirectHandler().hasNewResolver(intent)) {
                         return OverrideUrlLoadingResult.NO_OVERRIDE;
                     }
                 }
                 // The intent can be used to launch Chrome itself, record the user
                 // gesture here so that it can be used later.
                 if (params.hasUserGesture()) {
                     IntentWithGesturesHandler.getInstance().onNewIntentWithGesture(intent);
                 }
 
+                if (CommandLine.getInstance().hasSwitch(ChromeSwitches.ENABLE_WEBAPK)) {
+                    // If the only specialized intent handler is a WebAPK, set the intent's package
+                    // to launch the WebAPK without showing the intent picker.
+                    String targetWebApkPackageName =
+                            mDelegate.findValidWebApkPackageName(resolvingInfos);
+                    if (targetWebApkPackageName != null
+                            && mDelegate.countSpecializedHandlers(resolvingInfos) == 1) {
+                        intent.setPackage(targetWebApkPackageName);
+                    }
+                }
+
                 if (mDelegate.startActivityIfNeeded(intent)) {
                     return OverrideUrlLoadingResult.OVERRIDE_WITH_EXTERNAL_INTENT;
                 } else {
                     return OverrideUrlLoadingResult.NO_OVERRIDE;
                 }
             }
         } catch (ActivityNotFoundException ex) {
             // Ignore the error. If no application can handle the URL,
             // assume the browser can handle it.
         }
@@ skipping 54 matching lines @@
         if (defaultSmsPackageName == null) return null;
         // Makes sure that the default SMS app actually resolves the intent.
         for (ResolveInfo resolveInfo : resolvingComponentNames) {
             if (defaultSmsPackageName.equals(resolveInfo.activityInfo.packageName)) {
                 return defaultSmsPackageName;
             }
         }
         return null;
     }
 }