Convert base::Callback in chrome/browser/vr

Converts ModelAddedCallback and ModelRemovedCallback to base::Repeating
Callbacks to match their usage. Removes the corresponding entry from
PRESUBMIT.py

Bug: 1007635
Change-Id: I10393eea74ff16ba86f5e7118765557fca770028
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2303877
Commit-Queue: Alexander Cooper <alcooper@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#790982}

PRESUBMIT.py

@@ -342,7 +342,6 @@ _NOT_CONVERTED_TO_MODERN_BIND_AND_CALLBACK = '|'.join((
   '^chrome/browser/tracing/chrome_tracing_delegate_browsertest.cc',
   '^chrome/browser/translate/',
   '^chrome/browser/ui/',
-  '^chrome/browser/vr/databinding/vector_binding.h',
   '^chrome/browser/web_applications/',
   '^chrome/browser/win/',
   '^chrome/services/',

chrome/browser/vr/databinding/vector_binding.h

@@ -21,9 +21,9 @@ namespace vr {
 template <typename M, typename V>
 class VectorBinding : public BindingBase {
  public:
-  typedef VectorElementBinding<M, V> ElementBinding;
-  typedef base::Callback<void(ElementBinding*)> ModelAddedCallback;
-  typedef base::Callback<void(ElementBinding*)> ModelRemovedCallback;
+  using ElementBinding = VectorElementBinding<M, V>;
+  using ModelAddedCallback = base::RepeatingCallback<void(ElementBinding*)>;
+  using ModelRemovedCallback = base::RepeatingCallback<void(ElementBinding*)>;
 
   VectorBinding(std::vector<M>* models,
                 const ModelAddedCallback& added_callback,