Force compiler to deduce src type for checked_cast<dst, src>.

third_party/base/stl_util.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_
 #define PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_
 
 #include <algorithm>
 #include <memory>
 #include <set>
@@ skipping 23 matching lines @@
 class FakeUniquePtr : public std::unique_ptr<T> {
  public:
   using std::unique_ptr<T>::unique_ptr;
   ~FakeUniquePtr() { std::unique_ptr<T>::release(); }
 };
 
 // Convenience routine for "int-fected" code, so that the stl collection
 // size_t size() method return values will be checked.
 template <typename ResultType, typename Collection>
 ResultType CollectionSize(const Collection& collection) {
-  return pdfium::base::checked_cast<ResultType, size_t>(collection.size());
+  return pdfium::base::checked_cast<ResultType>(collection.size());
 }
 
 // Track the addition of an object to a set, removing it automatically when
 // the ScopedSetInsertion goes out of scope.
 template <typename T>
 class ScopedSetInsertion {
  public:
   ScopedSetInsertion(std::set<T>* org_set, T elem)
       : m_Set(org_set), m_Entry(elem) {
     m_Set->insert(m_Entry);
   }
   ~ScopedSetInsertion() { m_Set->erase(m_Entry); }
 
  private:
   std::set<T>* const m_Set;
   const T m_Entry;
 };
 
 }  // namespace pdfium
 
 #endif  // PDFIUM_THIRD_PARTY_BASE_STL_UTIL_H_