Cleaned up CpuFeature scope handling.

src/arm/full-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 3025 matching lines @@
   // Convert 32 random bits in r0 to 0.(32 random bits) in a double
   // by computing:
   // ( 1.(20 0s)(32 random bits) x 2^20 ) - (1.0 x 2^20)).
   if (CpuFeatures::IsSupported(VFP2)) {
     __ PrepareCallCFunction(1, r0);
     __ ldr(r0,
            ContextOperand(context_register(), Context::GLOBAL_OBJECT_INDEX));
     __ ldr(r0, FieldMemOperand(r0, GlobalObject::kNativeContextOffset));
     __ CallCFunction(ExternalReference::random_uint32_function(isolate()), 1);
 
-    CpuFeatures::Scope scope(VFP2);
+    CpuFeatureScope scope(masm(), VFP2);
     // 0x41300000 is the top half of 1.0 x 2^20 as a double.
     // Create this constant using mov/orr to avoid PC relative load.
     __ mov(r1, Operand(0x41000000));
     __ orr(r1, r1, Operand(0x300000));
     // Move 0x41300000xxxxxxxx (x = random bits) to VFP.
     __ vmov(d7, r0, r1);
     // Move 0x4130000000000000 to VFP.
     __ mov(r0, Operand::Zero());
     __ vmov(d8, r0, r1);
     // Subtract and store the result in the heap number.
@@ skipping 1535 matching lines @@
   *context_length = 0;
   return previous_;
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM