Make blob scheme donwloadable through context menu

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

Index: chrome/android/java/src/org/chromium/chrome/browser/UrlUtilities.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/UrlUtilities.java b/chrome/android/java/src/org/chromium/chrome/browser/UrlUtilities.java
index 0d578f8f56a37be9b232ae7716ea82d5874b828b..f51aa434a9d08833e060b61e27879790ebf82443 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/UrlUtilities.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/UrlUtilities.java
@@ -35,7 +35,7 @@ public class UrlUtilities {
      * URI schemes that Chrome can download.
      */
     private static final HashSet<String> DOWNLOADABLE_SCHEMES = CollectionUtil.newHashSet(
-            "data", "filesystem", "http", "https");
+            "data", "filesystem", "http", "https", "blob");
 
     /**
      * URI schemes that are internal to Chrome.