Remove DoubleRepresentation from globals.h

src/globals.h

 // Copyright 2012 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_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 615 matching lines @@
   kStoreBufferFullEvent,
   kStoreBufferStartScanningPagesEvent,
   kStoreBufferScanningPageEvent
 } StoreBufferEvent;
 
 
 typedef void (*StoreBufferCallback)(Heap* heap,
                                     MemoryChunk* page,
                                     StoreBufferEvent event);
 
-
-// Union used for fast testing of specific double values.
-union DoubleRepresentation {
-  double  value;
-  int64_t bits;
-  DoubleRepresentation(double x) { value = x; }
-  bool operator==(const DoubleRepresentation& other) const {
-    return bits == other.bits;
-  }
-};
-
-
 // Union used for customized checking of the IEEE double types
 // inlined within v8 runtime, rather than going to the underlying
 // platform headers and libraries
 union IeeeDoubleLittleEndianArchType {
   double d;
   struct {
     unsigned int man_low  :32;
     unsigned int man_high :20;
     unsigned int exp      :11;
     unsigned int sign     :1;
@@ skipping 457 matching lines @@
   return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >>
                                kPointerSizeLog2);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_