Add a hook for capturing a user profile photo and saving it to file and local state.

chrome/browser/chromeos/login/take_photo_view.cc

Index: chrome/browser/chromeos/login/take_photo_view.cc
diff --git a/chrome/browser/chromeos/login/take_photo_view.cc b/chrome/browser/chromeos/login/take_photo_view.cc
index ae7ace176333a94f6a8cea77f4ac13ec7fc7b8c2..716dd2de8f4736eefb39abe6f4e02938b150376e 100644
--- a/chrome/browser/chromeos/login/take_photo_view.cc
+++ b/chrome/browser/chromeos/login/take_photo_view.cc
@@ -290,6 +290,10 @@ void TakePhotoView::ButtonPressed(
     views::Button* sender, const views::Event& event) {
   DCHECK(delegate_);
   DCHECK(sender == snapshot_button_);
+  ButtonPressed();
+}
+
+void TakePhotoView::ButtonPressed() {
   if (is_capturing_) {
     CaptureImage();
   } else {