Use std:: on symbols declared in C++-style C headers.

src/arm/codegen-arm.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 32 matching lines @@
 #if defined(USE_SIMULATOR)
 byte* fast_exp_arm_machine_code = NULL;
 double fast_exp_simulator(double x) {
   return Simulator::current(Isolate::Current())->CallFPReturnsDouble(
       fast_exp_arm_machine_code, x, 0);
 }
 #endif
 
 
 UnaryMathFunction CreateExpFunction() {
-  if (!FLAG_fast_math) return &exp;
+  if (!FLAG_fast_math) return &std::exp;
   size_t actual_size;
   byte* buffer = static_cast<byte*>(OS::Allocate(1 * KB, &actual_size, true));
-  if (buffer == NULL) return &exp;
+  if (buffer == NULL) return &std::exp;
   ExternalReference::InitializeMathExpData();
 
   MacroAssembler masm(NULL, buffer, static_cast<int>(actual_size));
 
   {
     DwVfpRegister input = d0;
     DwVfpRegister result = d1;
     DwVfpRegister double_scratch1 = d2;
     DwVfpRegister double_scratch2 = d3;
     Register temp1 = r4;
@@ skipping 841 matching lines @@
     patcher.masm()->add(r0, pc, Operand(-8));
     patcher.masm()->ldr(pc, MemOperand(pc, -4));
     patcher.masm()->emit_code_stub_address(stub);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM