Photo Picker Dialog: Add window enter animation.

chrome/android/java/src/org/chromium/chrome/browser/init/ProcessInitializationHandler.java

Index: chrome/android/java/src/org/chromium/chrome/browser/init/ProcessInitializationHandler.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/init/ProcessInitializationHandler.java b/chrome/android/java/src/org/chromium/chrome/browser/init/ProcessInitializationHandler.java
index 903ce8cf265cafe1a61e9246455827e2549e9e0c..8b67ed07fcfdab316ebe3cc82a9dca5cc9df875a 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/init/ProcessInitializationHandler.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/init/ProcessInitializationHandler.java
@@ -222,6 +222,8 @@ public class ProcessInitializationHandler {
                 public void showPhotoPicker(
                         Context context, PhotoPickerListener listener, boolean allowMultiple) {
                     mDialog = new PhotoPickerDialog(context, listener, allowMultiple);
+                    mDialog.getWindow().getAttributes().windowAnimations =
+                            R.style.PhotoPickerDialogAnimation;
                     mDialog.show();
                 }