IntentHelper fix for chooser activity

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

Index: chrome/android/java/src/org/chromium/chrome/browser/IntentHelper.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/IntentHelper.java b/chrome/android/java/src/org/chromium/chrome/browser/IntentHelper.java
index 89975c68a6bfed4cbaed81f127b5597822f55718..487d71d68fca32cb1fe9550e48ac9239c20d7d31 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/IntentHelper.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/IntentHelper.java
@@ -61,7 +61,10 @@ public abstract class IntentHelper {
         send.putExtra(Intent.EXTRA_SUBJECT, subject);
         send.putExtra(Intent.EXTRA_TEXT, Html.fromHtml(body));
         try {
-            context.startActivity(Intent.createChooser(send, chooserTitle));
+            Intent chooser = Intent.createChooser(send, chooserTitle));
+            // we start this activity outside the main activity.
+            chooser.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+            context.startActivity(chooser);
         } catch (android.content.ActivityNotFoundException ex) {
             // If no app handles it, do nothing.
         }