Bug 1225980 - Add a startGecko static method to GeckoService, to be used for GeckoCustomTabsService.warmup() r=rbarker

mobile/android/base/java/org/mozilla/gecko/GeckoService.java

@@ -11,6 +11,8 @@ import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.os.IBinder;
+import android.os.Handler;
+import android.os.Looper;
 import android.util.Log;
 
 import java.io.File;
@@ -205,4 +207,30 @@ public class GeckoService extends Service {
     public IBinder onBind(final Intent intent) {
         return null;
     }
+
+    public static void startGecko(final GeckoProfile profile, final String args, final Context context) {
+        if (GeckoThread.isLaunched()) {
+            if (DEBUG) {
+                Log.v(LOGTAG, "already launched");
+            }
+            return;
+        }
+
+        Handler handler = new Handler(Looper.getMainLooper());
+        handler.post(new Runnable() {
+            @Override
+            public void run() {
+                GeckoAppShell.ensureCrashHandling();
+                GeckoAppShell.setApplicationContext(context);
+                GeckoThread.onResume();
+
+                GeckoThread.init(profile, args, null, false);
+                GeckoThread.launch();
+
+                if (DEBUG) {
+                    Log.v(LOGTAG, "warmed up (launched)");
+                }
+            }
+        });
+    }
 }

mobile/android/base/java/org/mozilla/gecko/customtabs/GeckoCustomTabsService.java

@@ -11,6 +11,9 @@ import android.support.customtabs.CustomTabsService;
 import android.support.customtabs.CustomTabsSessionToken;
 import android.util.Log;
 
+import org.mozilla.gecko.GeckoProfile;
+import org.mozilla.gecko.GeckoService;
+
 import java.util.List;
 
 /**
@@ -18,6 +21,7 @@ import java.util.List;
  */
 public class GeckoCustomTabsService extends CustomTabsService {
     private static final String LOGTAG = "GeckoCustomTabsService";
+    private static final boolean DEBUG = false;
 
     @Override
     protected boolean updateVisuals(CustomTabsSessionToken sessionToken, Bundle bundle) {
@@ -28,9 +32,12 @@ public class GeckoCustomTabsService extends CustomTabsService {
 
     @Override
     protected boolean warmup(long flags) {
-        Log.v(LOGTAG, "warmup()");
+        if (DEBUG) {
+            Log.v(LOGTAG, "warming up...");
+        }
+
+        GeckoService.startGecko(GeckoProfile.initFromArgs(this, null), null, getApplicationContext());
 
-        // Pretend warmup was successful
         return true;
     }