Move platform abstraction to base library

src/arm/regexp-macro-assembler-arm.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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/code-stubs.h"
 #include "src/cpu-profiler.h"
@@ skipping 993 matching lines @@
 
 void RegExpMacroAssemblerARM::CallCheckStackGuardState(Register scratch) {
   __ PrepareCallCFunction(3, scratch);
 
   // RegExp code frame pointer.
   __ mov(r2, frame_pointer());
   // Code* of self.
   __ mov(r1, Operand(masm_->CodeObject()));
 
   // We need to make room for the return address on the stack.
-  int stack_alignment = OS::ActivationFrameAlignment();
+  int stack_alignment = base::OS::ActivationFrameAlignment();
   ASSERT(IsAligned(stack_alignment, kPointerSize));
   __ sub(sp, sp, Operand(stack_alignment));
 
   // r0 will point to the return address, placed by DirectCEntry.
   __ mov(r0, sp);
 
   ExternalReference stack_guard_check =
       ExternalReference::re_check_stack_guard_state(isolate());
   __ mov(ip, Operand(stack_guard_check));
   DirectCEntryStub stub(isolate());
@@ skipping 245 matching lines @@
 }
 
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }}  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM