Update from https://crrev.com/327068

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

Index: base/android/java/src/org/chromium/base/PathUtils.java
diff --git a/base/android/java/src/org/chromium/base/PathUtils.java b/base/android/java/src/org/chromium/base/PathUtils.java
index d70c0cc95ead4185f7a68fa1da2310db2b09a43d..5da080e834d6e684b53e272c7b4cc38eaf2cfbe3 100644
--- a/base/android/java/src/org/chromium/base/PathUtils.java
+++ b/base/android/java/src/org/chromium/base/PathUtils.java
@@ -6,26 +6,58 @@ package org.chromium.base;
 
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
+import android.os.AsyncTask;
 import android.os.Environment;
 
+import java.util.concurrent.ExecutionException;
+
 /**
  * This class provides the path related methods for the native library.
  */
 public abstract class PathUtils {
 
-    private static String sDataDirectorySuffix;
+    private static final int DATA_DIRECTORY = 0;
+    private static final int DATABASE_DIRECTORY = 1;
+    private static final int CACHE_DIRECTORY = 2;
+    private static final int NUM_DIRECTORIES = 3;
+    private static AsyncTask<String, Void, String[]> sDirPathFetchTask;
 
     // Prevent instantiation.
     private PathUtils() {}
 
     /**
-     * Sets the suffix that should be used for the directory where private data is to be stored
-     * by the application.
+     * Starts an asynchronous task to fetch the path of the directory where private data is to be
+     * stored by the application.
+     *
      * @param suffix The private data directory suffix.
      * @see Context#getDir(String, int)
      */
-    public static void setPrivateDataDirectorySuffix(String suffix) {
-        sDataDirectorySuffix = suffix;
+    public static void setPrivateDataDirectorySuffix(String suffix, Context context) {
+        final Context appContext = context.getApplicationContext();
+        sDirPathFetchTask = new AsyncTask<String, Void, String[]>() {
+            @Override
+            protected String[] doInBackground(String... dataDirectorySuffix) {
+                String[] paths = new String[NUM_DIRECTORIES];
+                paths[DATA_DIRECTORY] =
+                        appContext.getDir(dataDirectorySuffix[0], Context.MODE_PRIVATE).getPath();
+                paths[DATABASE_DIRECTORY] = appContext.getDatabasePath("foo").getParent();
+                paths[CACHE_DIRECTORY] = appContext.getCacheDir().getPath();
+                return paths;
+            }
+        }.executeOnExecutor(AsyncTask.SERIAL_EXECUTOR, suffix);
+    }
+
+    /**
+     * @param index The index of the cached directory path.
+     * @return The directory path requested, or null if not available.
+     */
+    private static String getDirectoryPath(int index) {
+        try {
+            return sDirPathFetchTask.get()[index];
+        } catch (InterruptedException e) {
+        } catch (ExecutionException e) {
+        }
+        return null;
     }
 
     /**
@@ -33,11 +65,8 @@ public abstract class PathUtils {
      */
     @CalledByNative
     public static String getDataDirectory(Context appContext) {
-        if (sDataDirectorySuffix == null) {
-            throw new IllegalStateException(
-                    "setDataDirectorySuffix must be called before getDataDirectory");
-        }
-        return appContext.getDir(sDataDirectorySuffix, Context.MODE_PRIVATE).getPath();
+        assert sDirPathFetchTask != null : "setDataDirectorySuffix must be called first.";
+        return getDirectoryPath(DATA_DIRECTORY);
     }
 
     /**
@@ -45,8 +74,8 @@ public abstract class PathUtils {
      */
     @CalledByNative
     public static String getDatabaseDirectory(Context appContext) {
-        // Context.getDatabasePath() returns path for the provided filename.
-        return appContext.getDatabasePath("foo").getParent();
+        assert sDirPathFetchTask != null : "setDataDirectorySuffix must be called first.";
+        return getDirectoryPath(DATABASE_DIRECTORY);
     }
 
     /**
@@ -55,7 +84,8 @@ public abstract class PathUtils {
     @SuppressWarnings("unused")
     @CalledByNative
     public static String getCacheDirectory(Context appContext) {
-        return appContext.getCacheDir().getPath();
+        assert sDirPathFetchTask != null : "setDataDirectorySuffix must be called first.";
+        return getDirectoryPath(CACHE_DIRECTORY);
     }
 
     /**