Replace math.h with cmath

src/code-stubs.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 549 matching lines @@
     Add(STRING);
     return !object->IsUndetectableObject() &&
         String::cast(*object)->length() != 0;
   } else if (object->IsSymbol()) {
     Add(SYMBOL);
     return true;
   } else if (object->IsHeapNumber()) {
     ASSERT(!object->IsUndetectableObject());
     Add(HEAP_NUMBER);
     double value = HeapNumber::cast(*object)->value();
-    return value != 0 && !isnan(value);
+    return value != 0 && !std::isnan(value);
   } else {
     // We should never see an internal object at runtime here!
     UNREACHABLE();
     return true;
   }
 }
 
 
 bool ToBooleanStub::Types::NeedsMap() const {
   return Contains(ToBooleanStub::SPEC_OBJECT)
@@ skipping 70 matching lines @@
   // already active, as the hooks won't stack.
   if (entry_hook != 0 && entry_hook_ != 0)
     return false;
 
   entry_hook_ = entry_hook;
   return true;
 }
 
 
 } }  // namespace v8::internal