Move platform abstraction to base library

src/hydrogen-gvn.cc

 // Copyright 2013 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/hydrogen.h"
 #include "src/hydrogen-gvn.h"
 #include "src/v8.h"
 
 namespace v8 {
 namespace internal {
@@ skipping 80 matching lines @@
 
  private:
   int count_;
   HInstruction* data_[kNumberOfTrackedSideEffects];
 };
 
 
 void TraceGVN(const char* msg, ...) {
   va_list arguments;
   va_start(arguments, msg);
-  OS::VPrint(msg, arguments);
+  base::OS::VPrint(msg, arguments);
   va_end(arguments);
 }
 
 
 // Wrap TraceGVN in macros to avoid the expense of evaluating its arguments when
 // --trace-gvn is off.
 #define TRACE_GVN_1(msg, a1)                    \
   if (FLAG_trace_gvn) {                         \
     TraceGVN(msg, a1);                          \
   }
@@ skipping 792 matching lines @@
                                                       dominated);
         successor_map->Kill(side_effects_on_all_paths);
         successor_dominators->Kill(side_effects_on_all_paths);
       }
     }
     current = next;
   }
 }
 
 } }  // namespace v8::internal