First step in enabling creating tabs without an Activity on Android.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/ServiceTabLauncher.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ServiceTabLauncher.java b/chrome/android/java/src/org/chromium/chrome/browser/ServiceTabLauncher.java
new file mode 100644
index 0000000000000000000000000000000000000000..f0eda8d0722c5b98f886d6974ec1acdccec2fba1
--- /dev/null
+++ b/chrome/android/java/src/org/chromium/chrome/browser/ServiceTabLauncher.java
@@ -0,0 +1,81 @@
+// 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;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.net.Uri;
+import android.util.Log;
+
+import org.chromium.base.CalledByNative;
+
+/**
+ * Tab Launcher to be used to launch new tabs from background Android Services, when it is not
+ * known whether an activity is available. It will send an intent to launch the activity.
+ *
+ * TODO(peter): Have the activity confirm that the tab has been launched.
+ */
+public class ServiceTabLauncher {
+    private static final String TAG = ServiceTabLauncher.class.getSimpleName();
+
+    private static final String BROWSER_ACTIVITY_KEY =
+            "org.chromium.chrome.browser.BROWSER_ACTIVITY";
+
+    private final long mNativeServiceTabLauncher;
+    private final Context mContext;
+
+    @CalledByNative
+    private static ServiceTabLauncher create(long nativeServiceTabLauncher, Context context) {
+        return new ServiceTabLauncher(nativeServiceTabLauncher, context);
+    }
+
+    private ServiceTabLauncher(long nativeServiceTabLauncher, Context context) {
+        mNativeServiceTabLauncher = nativeServiceTabLauncher;
+        mContext = context;
+    }
+
+    /**
+     * Launches the browser activity and launches a tab for |url|.
+     *
+     * @param url The URL to be opened in a new tab.
+     */
+    @CalledByNative
+    private void launchTab(String url) {
+        Intent intent = new Intent(mContext, getBrowserActivityClassFromManifest());
+        intent.setAction(Intent.ACTION_MAIN);
+        intent.addCategory(Intent.CATEGORY_LAUNCHER);
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        intent.setData(Uri.parse(url));
+
+        // TODO(peter): Add the referer.
+
+        mContext.startActivity(intent);
+    }
+
+    /**
+     * Reads the BROWSER_ACTIVITY name from the meta data in the Android Manifest file.
+     *
+     * @return Class for the browser activity to use when launching tabs.
+     */
+    private Class<?> getBrowserActivityClassFromManifest() {
+        try {
+            ApplicationInfo info = mContext.getPackageManager().getApplicationInfo(
+                    mContext.getPackageName(), PackageManager.GET_META_DATA);
+            String className = info.metaData.getString(BROWSER_ACTIVITY_KEY);
+
+            return Class.forName(className);
+

[mlamouri (slow - plz ping), 2015/02/11 13:50:23]

nit: empty line

[Peter Beverloo, 2015/02/11 16:18:27]

Done.

+        } catch (NameNotFoundException e) {
+            Log.e(TAG, "Context.getPackage() refers to an invalid package name.");
+        } catch (ClassNotFoundException e) {
+            Log.e(TAG, "Invalid value for BROWSER_ACTIVITY in the Android manifest file.");
+        }
+
+        return null;
+    }
+}