[Android WebAPK]: Remove restriction on max WebAPK share targets

This CL removes the restriction on the maximum number of WebAPK share targets
by switching from a checked-in ShareActivity{{index}} to an activity alias.

Bug=None

Change-Id: I40567760615da5a9e0c218621df6eac749cf80d0
Reviewed-on: https://chromium-review.googlesource.com/1191088
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Reviewed-by: Xi Han <hanxi@chromium.org>
Reviewed-by: Yaron Friedman <yfriedman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#587808}

chrome/android/webapk/shell_apk/AndroidManifest.xml

@@ -39,10 +39,9 @@
             {{{raw_intent_filters}}}
         </activity>
         {{#share_template}}
-        <activity android:name="org.chromium.webapk.shell_apk.ShareActivity{{{index}}}"
+        <activity-alias android:name="org.chromium.webapk.shell_apk.ShareActivity{{{index}}}"
                   android:label="{{{title}}}"
-                  android:theme="@android:style/Theme.Translucent.NoTitleBar"
-                  android:excludeFromRecents="true">
+                  android:targetActivity="org.chromium.webapk.shell_apk.ShareActivity">
           <meta-data android:name="org.chromium.webapk.shell_apk.shareAction" android:value="{{{action}}}" />
           <meta-data android:name="org.chromium.webapk.shell_apk.shareParamTitle" android:value="{{{param_title}}}" />
           <meta-data android:name="org.chromium.webapk.shell_apk.shareParamText" android:value="{{{param_text}}}" />
@@ -52,8 +51,11 @@
             <category android:name="android.intent.category.DEFAULT" />
             <data android:mimeType="text/plain" />
           </intent-filter>
-        </activity>
+        </activity-alias>
         {{/share_template}}
+        <activity android:name="org.chromium.webapk.shell_apk.ShareActivity"
+                  android:theme="@android:style/Theme.Translucent.NoTitleBar"
+                  android:excludeFromRecents="true"/>
         <meta-data android:name="org.chromium.webapk.shell_apk.shellApkVersion" android:value="{{{shell_apk_version}}}" />
         {{#bound_webapk}}
         <meta-data android:name="org.chromium.webapk.shell_apk.runtimeHost" android:value="{{{runtime_host}}}" />

chrome/android/webapk/shell_apk/BUILD.gn

@@ -42,11 +42,6 @@ template("webapk_java") {
       "src/org/chromium/webapk/shell_apk/InstallHostBrowserDialog.java",
       "src/org/chromium/webapk/shell_apk/MainActivity.java",
       "src/org/chromium/webapk/shell_apk/ShareActivity.java",
-      "src/org/chromium/webapk/shell_apk/ShareActivity0.java",
-      "src/org/chromium/webapk/shell_apk/ShareActivity1.java",
-      "src/org/chromium/webapk/shell_apk/ShareActivity2.java",
-      "src/org/chromium/webapk/shell_apk/ShareActivity3.java",
-      "src/org/chromium/webapk/shell_apk/ShareActivity4.java",
       "src/org/chromium/webapk/shell_apk/WebApkServiceFactory.java",
       "src/org/chromium/webapk/shell_apk/WebApkServiceImplWrapper.java",
       "src/org/chromium/webapk/shell_apk/WebApkUtils.java",

chrome/android/webapk/shell_apk/shell_apk_version.gni

@@ -6,7 +6,7 @@
 # (including AndroidManifest.xml) is updated. This version should be incremented
 # prior to uploading a new ShellAPK to the WebAPK Minting Server.
 # Does not affect Chrome.apk
-template_shell_apk_version = 50
+template_shell_apk_version = 51
 
 # The ShellAPK version expected by Chrome. Chrome will try to update the WebAPK
 # if the WebAPK's ShellAPK version is less than |expected_shell_apk_version|.

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/ShareActivity0.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.webapk.shell_apk;
-
-/**
- * Instance of a ShareActivity to support multiple share actions.
- */
-public class ShareActivity0 extends ShareActivity {}

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/ShareActivity1.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.webapk.shell_apk;
-
-/**
- * Instance of a ShareActivity to support multiple share actions.
- */
-public class ShareActivity1 extends ShareActivity {}

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/ShareActivity2.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.webapk.shell_apk;
-
-/**
- * Instance of a ShareActivity to support multiple share actions.
- */
-public class ShareActivity2 extends ShareActivity {}

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/ShareActivity3.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.webapk.shell_apk;
-
-/**
- * Instance of a ShareActivity to support multiple share actions.
- */
-public class ShareActivity3 extends ShareActivity {}

chrome/android/webapk/shell_apk/src/org/chromium/webapk/shell_apk/ShareActivity4.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.webapk.shell_apk;
-
-/**
- * Instance of a ShareActivity to support multiple share actions.
- */
-public class ShareActivity4 extends ShareActivity {}