Photo Picker dialog: Add accessibility support.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapView.java b/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapView.java
index efe355a64fff3534e3c04dbe0e92f364d14989c5..737a2161046c6301b9bf9d5cc17c1de8e6861ee1 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/photo_picker/PickerBitmapView.java
@@ -14,6 +14,7 @@ import android.support.graphics.drawable.VectorDrawableCompat;
 import android.util.AttributeSet;
 import android.view.View;
 import android.view.ViewGroup;
+import android.view.accessibility.AccessibilityNodeInfo;
 import android.view.animation.Animation;
 import android.view.animation.ScaleAnimation;
 import android.widget.ImageView;
@@ -178,6 +179,19 @@ public class PickerBitmapView extends SelectableItemView<PickerBitmap> {
         }
     }
 
+    @Override
+    public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
+        super.onInitializeAccessibilityNodeInfo(info);
+
+        if (!isPictureTile()) return;

[Finnur, 2017/06/29 13:26:20]

Just in case you are wondering, the Camera and Browse buttons already read their
text out loud for TalkBack.

+
+        info.setCheckable(true);
+        info.setChecked(isChecked());
+        CharSequence text = mBitmapDetails.getFilenameWithoutExtension() + " "
+                + mBitmapDetails.getLastModifiedString();
+        info.setText(text);
+    }
+
     /**
      * Sets the {@link PickerCategoryView} for this PickerBitmapView.
      * @param categoryView The category view showing the images. Used to access