Move platform abstraction to base library

src/cached-powers.h

 // Copyright 2010 the V8 project 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 V8_CACHED_POWERS_H_
 #define V8_CACHED_POWERS_H_
 
-#include "src/checks.h"
+#include "src/base/logging.h"
 #include "src/diy-fp.h"
 
 namespace v8 {
 namespace internal {
 
 class PowersOfTenCache {
  public:
   // Not all powers of ten are cached. The decimal exponent of two neighboring
   // cached numbers will differ by kDecimalExponentDistance.
   static const int kDecimalExponentDistance;
@@ skipping 14 matching lines @@
   //   kMinDecimalExponent <= requested_exponent, and
   //   requested_exponent < kMaxDecimalExponent + kDecimalExponentDistance.
   static void GetCachedPowerForDecimalExponent(int requested_exponent,
                                                DiyFp* power,
                                                int* found_exponent);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CACHED_POWERS_H_