[Document mode] Allow multiple popup windows to appear.

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java
index d9e905caf765baca4114fdaf5d461407ff2631de..368fcebda97a7f6a8f461a7ce4d03367674e1295 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/TabDelegate.java
@@ -11,7 +11,6 @@ import android.net.Uri;
 import android.text.TextUtils;
 
 import org.chromium.base.ApplicationStatus;
-import org.chromium.chrome.browser.ChromeActivity;
 import org.chromium.chrome.browser.IntentHandler;
 import org.chromium.chrome.browser.Tab;
 import org.chromium.chrome.browser.TabState;
@@ -28,13 +27,12 @@ import org.chromium.content_public.browser.LoadUrlParams;
 import org.chromium.content_public.browser.WebContents;
 import org.chromium.ui.base.PageTransition;
 
-import java.lang.ref.WeakReference;
-
 /**
  * Asynchronously creates Tabs by creating/starting up Activities.
  */
 public class TabDelegate extends TabCreator {
-    private boolean mIsIncognito;
+    private final boolean mIsIncognito;
+    private final AsyncDocumentLauncher mLaunchSerializer;
 
     /**
      * Creates a TabDelegate.
@@ -42,6 +40,7 @@ public class TabDelegate extends TabCreator {
      */
     public TabDelegate(boolean incognito) {
         mIsIncognito = incognito;
+        mLaunchSerializer = new AsyncDocumentLauncher(mIsIncognito);
     }
 
     @Override
@@ -143,11 +142,10 @@ public class TabDelegate extends TabCreator {
                 && asyncParams.getWebContents() != null);
 
         Context context = ApplicationStatus.getApplicationContext();
-        Activity parentActivity = getActivityForTabId(parentId);
+        Activity parentActivity = ActivityDelegate.getActivityForTabId(parentId);
 
         if (FeatureUtilities.isDocumentMode(context)) {
-            ChromeLauncherActivity.launchDocumentInstance(
-                    parentActivity, mIsIncognito, asyncParams);
+            mLaunchSerializer.enqueueLaunch(parentId, asyncParams);
         } else {
             // TODO(dfalcantara): Is it possible to get rid of this conditional?
             int assignedTabId = TabIdManager.getInstance().generateValidId(Tab.INVALID_TAB_ID);
@@ -173,19 +171,4 @@ public class TabDelegate extends TabCreator {
             IntentHandler.startActivityForTrustedIntent(intent, context);
         }
     }
-
-    /** @return Running Activity that owns the given Tab, null if the Activity couldn't be found. */
-    private Activity getActivityForTabId(int id) {
-        if (id == Tab.INVALID_TAB_ID) return null;
-
-        for (WeakReference<Activity> ref : ApplicationStatus.getRunningActivities()) {
-            if (!(ref.get() instanceof ChromeActivity)) continue;
-
-            ChromeActivity activity = (ChromeActivity) ref.get();
-            if (activity == null) continue;
-
-            if (activity.getTabModelSelector().getModelForTabId(id) != null) return activity;
-        }
-        return null;
-    }
 }