Remove dependency from platform files on v8.h

src/platform-cygwin.cc

 // 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.
 
 // Platform-specific code for Cygwin goes here. For the POSIX-compatible
 // parts, the implementation is in platform-posix.cc.
 
 #include <errno.h>
 #include <pthread.h>
 #include <semaphore.h>
 #include <stdarg.h>
 #include <strings.h>    // index
 #include <sys/mman.h>   // mmap & munmap
 #include <sys/time.h>
 #include <unistd.h>     // sysconf
 
+#include <cmath>
+
 #undef MAP_TYPE
 
-#include "src/v8.h"
-
 #include "src/base/win32-headers.h"
 #include "src/platform.h"
+#include "src/utils.h"
 
 namespace v8 {
 namespace internal {
 
 
 const char* OS::LocalTimezone(double time, TimezoneCache* cache) {
   if (std::isnan(time)) return "";
   time_t tv = static_cast<time_t>(std::floor(time/msPerSecond));
   struct tm* t = localtime(&tv);
   if (NULL == t) return "";
@@ skipping 197 matching lines @@
     : address_(ReserveRegion(size)), size_(size) { }
 
 
 VirtualMemory::VirtualMemory(size_t size, size_t alignment)
     : address_(NULL), size_(0) {
   ASSERT(IsAligned(alignment, static_cast<intptr_t>(OS::AllocateAlignment())));
   size_t request_size = RoundUp(size + alignment,
                                 static_cast<intptr_t>(OS::AllocateAlignment()));
   void* address = ReserveRegion(request_size);
   if (address == NULL) return;
-  Address base = RoundUp(static_cast<Address>(address), alignment);
+  uint8_t* base = RoundUp(static_cast<uint8_t*>(address), alignment);
   // Try reducing the size by freeing and then reallocating a specific area.
   bool result = ReleaseRegion(address, request_size);
   USE(result);
   ASSERT(result);
   address = VirtualAlloc(base, size, MEM_RESERVE, PAGE_NOACCESS);
   if (address != NULL) {
     request_size = size;
-    ASSERT(base == static_cast<Address>(address));
+    ASSERT(base == static_cast<uint8_t*>(address));
   } else {
     // Resizing failed, just go with a bigger area.
     address = ReserveRegion(request_size);
     if (address == NULL) return;
   }
   address_ = address;
   size_ = request_size;
 }
 
 
@@ skipping 62 matching lines @@
   return VirtualFree(base, 0, MEM_RELEASE) != 0;
 }
 
 
 bool VirtualMemory::HasLazyCommits() {
   // TODO(alph): implement for the platform.
   return false;
 }
 
 } }  // namespace v8::internal