[Android WebAPKs] Don't navigate WebAPK when launching it from launcher

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java

Index: chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java
diff --git a/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java b/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java
index 17d438aeed38eb314c28bcc6e21b378e76a382e0..5a0b7d4ad695cdde432daec0b660ab4e1c15195f 100644
--- a/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java
+++ b/chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/MainActivity.java
@@ -67,11 +67,13 @@ public class MainActivity extends Activity {
      * Launches WebAPK.
      */
     private void launch() {
-        String startUrl = getStartUrl();
+        String overrideUrl = getOverrideUrl();
+        String startUrl = (overrideUrl != null) ? overrideUrl : getStartUrl();
         if (startUrl == null) {
             return;
         }
-        if (launchHostBrowserInWebApkMode(startUrl)) {
+
+        if (launchHostBrowserInWebApkMode(startUrl, overrideUrl)) {
             return;
         }
         if (launchBrowser(startUrl)) {
@@ -84,19 +86,23 @@ public class MainActivity extends Activity {
      * Launches host browser in WebAPK mode.
      * @return True if successful.
      */
-    private boolean launchHostBrowserInWebApkMode(String startUrl) {
+    private boolean launchHostBrowserInWebApkMode(String startUrl, String overrideUrl) {
         Log.v(TAG, "Url of the WebAPK: " + startUrl);
         String packageName = getPackageName();
         Log.v(TAG, "Package name of the WebAPK:" + packageName);
 
         String runtimeHost = WebApkUtils.getHostBrowserPackageName(this);
         int source = getIntent().getIntExtra(WebApkConstants.EXTRA_SOURCE, 0);
+
+        // The override URL is non null when the WebAPK is launched from a deep link. The WebAPK
+        // should navigate to the URL in the deep link even if the WebAPK is already open.
         Intent intent = new Intent();
         intent.setAction(ACTION_START_WEBAPK);
         intent.setPackage(runtimeHost);
         intent.putExtra(WebApkConstants.EXTRA_URL, startUrl)
                 .putExtra(WebApkConstants.EXTRA_SOURCE, source)
-                .putExtra(WebApkConstants.EXTRA_WEBAPK_PACKAGE_NAME, packageName);
+                .putExtra(WebApkConstants.EXTRA_WEBAPK_PACKAGE_NAME, packageName)
+                .putExtra(WebApkConstants.EXTRA_WEBAPK_FORCE_NAVIGATION, (overrideUrl != null));
 
         try {
             startActivity(intent);
@@ -155,15 +161,17 @@ public class MainActivity extends Activity {
         }
     }
 
-    /**
-     * Returns the URL that the browser should navigate to.
-     */
-    private String getStartUrl() {
+    /** Retrieves URL from the intent's data. Returns null if a URL could not be retrieved. */
+    private String getOverrideUrl() {
         String overrideUrl = getIntent().getDataString();
         if (overrideUrl != null && overrideUrl.startsWith("https:")) {
             return overrideUrl;
         }
+        return null;
+    }
 
+    /** Returns the start URL from the Android Manifest. */
+    private String getStartUrl() {
         ApplicationInfo appInfo;
         try {
             appInfo = getPackageManager().getApplicationInfo(