Bulk update of Google copyright headers in source files.

src/bignum-dtoa.h

 // Copyright 2010 the V8 project authors. All rights reserved.
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-// met:
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-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
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+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
 
 #ifndef V8_BIGNUM_DTOA_H_
 #define V8_BIGNUM_DTOA_H_
 
 namespace v8 {
 namespace internal {
 
 enum BignumDtoaMode {
   // Return the shortest correct representation.
   // For example the output of 0.299999999999999988897 is (the less accurate but
@@ skipping 35 matching lines @@
 //   which case the caller has to fill the missing digits with '0's.
 //   Halfway cases are again rounded up.
 // 'BignumDtoa' expects the given buffer to be big enough to hold all digits
 // and a terminating null-character.
 void BignumDtoa(double v, BignumDtoaMode mode, int requested_digits,
                 Vector<char> buffer, int* length, int* point);
 
 } }  // namespace v8::internal
 
 #endif  // V8_BIGNUM_DTOA_H_