libchrome: Several upstreamable fixes from libchrome

base/numerics/safe_math_impl.h

 // Copyright 2014 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 BASE_NUMERICS_SAFE_MATH_IMPL_H_
 #define BASE_NUMERICS_SAFE_MATH_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 427 matching lines @@
 
  public:
   template <typename Src, NumericRepresentation type>
   friend class CheckedNumericState;
 
   CheckedNumericState() : value_(0.0) {}
 
   template <typename Src>
   CheckedNumericState(
       Src value,
-      RangeConstraint validity,
+      RangeConstraint /*validity*/,
       typename std::enable_if<std::numeric_limits<Src>::is_integer, int>::type =
           0) {
     switch (DstRangeRelationToSrcRange<T>(value)) {
       case RANGE_VALID:
         value_ = static_cast<T>(value);
         break;
 
       case RANGE_UNDERFLOW:
         value_ = -std::numeric_limits<T>::infinity();
         break;
@@ skipping 64 matching lines @@
                             sizeof(T) >= (2 * sizeof(Lhs)) &&
                             StaticDstRangeRelationToSrcRange<T, Rhs>::value !=
                                 NUMERIC_RANGE_CONTAINED &&
                             sizeof(T) >= (2 * sizeof(Rhs));
 };
 
 }  // namespace internal
 }  // namespace base
 
 #endif  // BASE_NUMERICS_SAFE_MATH_IMPL_H_