Upstream: Launch WebApkActivity from WebAPK.

chrome/android/java/AndroidManifest.xml

 <?xml version="1.0" encoding="utf-8"?>
 <!-- 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. -->
 
 <!--
 Note: This is a jinja2 template, processed at build time into the final manifest.
 
 Blocks denoted with { % block some_name % }foo{ % endblock % } can be overridden
 by a child template that "extends" this file.
@@ skipping 392 matching lines @@
             android:hardwareAccelerated="false"
             android:taskAffinity="{{ manifest_package }}.webapps.WebappActivity{{ i }}"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|mcc|mnc|screenLayout|smallestScreenSize">
         </activity>
         <activity-alias android:name="com.google.android.apps.chrome.webapps.WebappActivity{{ i }}"
             android:targetActivity="org.chromium.chrome.browser.webapps.WebappActivity{{ i }}"
             android:icon="@mipmap/app_shortcut_icon"
             android:label="@string/webapp_activity_title">
         </activity-alias>
         {% endfor %}
+        <!--
+            Activities for WebAPKs.
+        -->
+        <activity android:name="org.chromium.chrome.browser.webapps.WebApkActivity"
+            android:theme="@style/WebappTheme"
+            android:label="@string/webapp_activity_title"
+            android:launchMode="singleTop"
+            android:documentLaunchMode="intoExisting"
+            android:windowSoftInputMode="adjustResize"
+            android:persistableMode="persistNever"
+            android:hardwareAccelerated="false"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|mcc|mnc|screenLayout|smallestScreenSize">
+        </activity>
+        <activity-alias android:name="com.google.android.apps.chrome.webapps.WebApkActivity"

[gone, 2016/05/25 21:50:13]

Don't need this alias.

[Xi Han, 2016/05/26 17:23:35]

I thought the alias was for different channels of Chrome. Just out of curiosity,
 when to use the alias for the webappActivity?

[gone, 2016/05/26 18:20:36]

You should only use an alias when an Activity's file gets moved after it has
already been exposed to users.  In this case, when we upstreamed WebappActivity,
it moved from com/google/android/apps/chrome/webapps/WebappActivity.java to
org/chromium/chrome/browser/webapps/WebappActivity.java

+            android:targetActivity="org.chromium.chrome.browser.webapps.WebApkActivity"
+            android:label="@string/webapp_activity_title">
+        </activity-alias>
+        {% for i in range(10) %}
+        <activity android:name="org.chromium.chrome.browser.webapps.WebApkActivity{{ i }}"
+            android:theme="@style/WebappTheme"
+            android:icon="@mipmap/app_shortcut_icon"
+            android:label="@string/webapp_activity_title"
+            android:launchMode="singleTask"
+            android:windowSoftInputMode="adjustResize"
+            android:persistableMode="persistNever"
+            android:hardwareAccelerated="false"
+            android:taskAffinity="{{ manifest_package }}.webapps.WebApkActivity{{ i }}"
+            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|mcc|mnc|screenLayout|smallestScreenSize">
+        </activity>
+        <activity-alias android:name="com.google.android.apps.chrome.webapps.WebApkActivity{{ i }}"

[gone, 2016/05/25 21:50:13]

You don't need this alias; it's only necessary for WebappActivity because we
changed the package name at some point.

[Xi Han, 2016/05/26 17:23:36]

Same question as above. WebApkActivity looks similar to WebappActivity, why
don't we need to change their's package name?

+            android:targetActivity="org.chromium.chrome.browser.webapps.WebApkActivity{{ i }}"
+            android:icon="@mipmap/app_shortcut_icon"
+            android:label="@string/webapp_activity_title">
+        </activity-alias>
+        {% endfor %}
 
         <activity android:name="org.chromium.chrome.browser.media.remote.ExpandedControllerActivity"
             android:theme="@style/MainTheme"
             android:label="Chrome.ExpandedControllerActivity"
             android:hardwareAccelerated="true"
             android:launchMode="singleTask"
             android:noHistory="true"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|mcc|mnc|screenLayout|smallestScreenSize"
             android:excludeFromRecents="true">
         </activity>
@@ skipping 377 matching lines @@
              choose the first MediaRouteController that can play it, so the order of the list can be important.
              The most specific MediaRouteControllers should be listed first, followed by more generic ones.
              The downstream manifest replaces this block, and hence replaces the list of media route
              controllers with its own list. -->
         <meta-data android:name="org.chromium.content.browser.REMOTE_MEDIA_PLAYERS"
             android:value="org.chromium.chrome.browser.media.remote.DefaultMediaRouteController"/>
 
         {% endblock %}
     </application>
 </manifest>