DO NOT SUBMIT: add main dex list check to classloader.

base/android/java/src/org/chromium/base/FileUtils.java

Index: base/android/java/src/org/chromium/base/FileUtils.java
diff --git a/base/android/java/src/org/chromium/base/FileUtils.java b/base/android/java/src/org/chromium/base/FileUtils.java
index 931b0c4ace2cb8c99fcb01dbb6a850cd20c9fdd7..0f83d6c3e63cee12b195ea4f16db353a077101ea 100644
--- a/base/android/java/src/org/chromium/base/FileUtils.java
+++ b/base/android/java/src/org/chromium/base/FileUtils.java
@@ -8,10 +8,12 @@ import android.content.Context;
 import android.net.Uri;
 
 import java.io.BufferedOutputStream;
+import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.io.OutputStream;
 import java.util.List;
 
@@ -110,4 +112,20 @@ public class FileUtils {
 
         return uri;
     }
+
+    public static String extractAsset(String assetName) {
+        StringBuilder buf = new StringBuilder();
+        try {
+            InputStream is = ContextUtils.getApplicationContext().getAssets().open(assetName);
+            BufferedReader in = new BufferedReader(new InputStreamReader(is, "UTF-8"));
+            String str;
+            while ((str = in.readLine()) != null) {
+                buf.append(str);
+            }
+            in.close();
+            return buf.toString();
+        } catch (IOException e) {
+        }
+        return "";
+    }
 }