Replace math.h with cmath

src/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2727 matching lines @@
 
 
 bool Heap::CreateInitialObjects() {
   Object* obj;
 
   // The -0 value must be set before NumberFromDouble works.
   { MaybeObject* maybe_obj = AllocateHeapNumber(-0.0, TENURED);
     if (!maybe_obj->ToObject(&obj)) return false;
   }
   set_minus_zero_value(HeapNumber::cast(obj));
-  ASSERT(signbit(minus_zero_value()->Number()) != 0);
+  ASSERT(std::signbit(minus_zero_value()->Number()) != 0);
 
   { MaybeObject* maybe_obj = AllocateHeapNumber(OS::nan_value(), TENURED);
     if (!maybe_obj->ToObject(&obj)) return false;
   }
   set_nan_value(HeapNumber::cast(obj));
 
   { MaybeObject* maybe_obj = AllocateHeapNumber(V8_INFINITY, TENURED);
     if (!maybe_obj->ToObject(&obj)) return false;
   }
   set_infinity_value(HeapNumber::cast(obj));
@@ skipping 5094 matching lines @@
       static_cast<int>(object_sizes_last_time_[index]));
   FIXED_ARRAY_SUB_INSTANCE_TYPE_LIST(ADJUST_LAST_TIME_OBJECT_COUNT)
 #undef ADJUST_LAST_TIME_OBJECT_COUNT
 
   OS::MemCopy(object_counts_last_time_, object_counts_, sizeof(object_counts_));
   OS::MemCopy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_));
   ClearObjectStats();
 }
 
 } }  // namespace v8::internal