Remove grab-bag includes of v8.h from several files.

src/diy-fp.h

 // Copyright 2011 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_DIY_FP_H_
 #define V8_DIY_FP_H_
 
+#include <stdint.h>
+
+#include "src/base/logging.h"
+
 namespace v8 {
 namespace internal {
 
 // This "Do It Yourself Floating Point" class implements a floating-point number
 // with a uint64 significand and an int exponent. Normalized DiyFp numbers will
 // have the most significant bit of the significand set.
 // Multiplication and Subtraction do not normalize their results.
 // DiyFp are not designed to contain special doubles (NaN and Infinity).
 class DiyFp {
  public:
@@ skipping 67 matching lines @@
  private:
   static const uint64_t kUint64MSB = static_cast<uint64_t>(1) << 63;
 
   uint64_t f_;
   int e_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_DIY_FP_H_