Photo Picker dialog: Add a test.

chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java

Index: chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java b/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java
index 4dd088612ecefcb055fc6b7fd9d9bd4ead8d5e9f..5fe78a37fd6b69dc60af29ee7e334e116ca95219 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapViewHolder.java
@@ -10,6 +10,7 @@ import android.os.AsyncTask;
 import android.support.v7.widget.RecyclerView.ViewHolder;
 import android.text.TextUtils;
 
+import org.chromium.base.VisibleForTesting;
 import org.chromium.chrome.R;
 
 import java.util.List;
@@ -108,4 +109,9 @@ public class PickerBitmapViewHolder
     public String getFilePath() {
         return mBitmapDetails == null ? null : mBitmapDetails.getFilePath();
     }
+
+    @VisibleForTesting
+    public boolean getImageLoadingForTesting() {
+        return mItemView.getImageLoadingForTesting();
+    }
 }