Photo Picker dialog: Add a test.

ui/android/java/src/org/chromium/ui/PhotoPickerListener.java

Index: ui/android/java/src/org/chromium/ui/PhotoPickerListener.java
diff --git a/ui/android/java/src/org/chromium/ui/PhotoPickerListener.java b/ui/android/java/src/org/chromium/ui/PhotoPickerListener.java
index ea4e6784f2d85a63d3216646fc8128d0feb73ab0..a2321d121acbbfacddab97123aa8ed3cbad196a7 100644
--- a/ui/android/java/src/org/chromium/ui/PhotoPickerListener.java
+++ b/ui/android/java/src/org/chromium/ui/PhotoPickerListener.java
@@ -4,10 +4,6 @@
 
 package org.chromium.ui;
 
-import android.support.annotation.Nullable;
-
-import java.util.Map;
-
 /**
  * The callback used to indicate what action the user took in the picker.
  */
@@ -34,13 +30,4 @@ public interface PhotoPickerListener {
      * @param photos The photos that were selected.
      */
     void onPickerUserAction(Action action, String[] photos);
-
-    /**
-     * Used during testing to provide pre-canned data to the dialog.
-     *
-     * @return The test files to use (Map<String, Long>, mapping file paths to creation times) or
-     *     null when run outside of a test.
-     */
-    @Nullable
-    Map<String, Long> getFilesForTesting();
 }