Move platform abstraction to base library

src/compiler.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"
 
 #include "src/compiler.h"
 
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 335 matching lines @@
   if (!info()->closure()->PassesFilter(FLAG_hydrogen_filter)) {
     return AbortOptimization(kHydrogenFilter);
   }
 
   // Recompile the unoptimized version of the code if the current version
   // doesn't have deoptimization support. Alternatively, we may decide to
   // run the full code generator to get a baseline for the compile-time
   // performance of the hydrogen-based compiler.
   bool should_recompile = !info()->shared_info()->has_deoptimization_support();
   if (should_recompile || FLAG_hydrogen_stats) {
-    ElapsedTimer timer;
+    base::ElapsedTimer timer;
     if (FLAG_hydrogen_stats) {
       timer.Start();
     }
     CompilationInfoWithZone unoptimized(info()->shared_info());
     // Note that we use the same AST that we will use for generating the
     // optimized code.
     unoptimized.SetFunction(info()->function());
     unoptimized.PrepareForCompilation(info()->scope());
     unoptimized.SetContext(info()->context());
     if (should_recompile) unoptimized.EnableDeoptimizationSupport();
@@ skipping 939 matching lines @@
 
 bool CompilationPhase::ShouldProduceTraceOutput() const {
   // Trace if the appropriate trace flag is set and the phase name's first
   // character is in the FLAG_trace_phase command line parameter.
   AllowHandleDereference allow_deref;
   bool tracing_on = info()->IsStub()
       ? FLAG_trace_hydrogen_stubs
       : (FLAG_trace_hydrogen &&
          info()->closure()->PassesFilter(FLAG_trace_hydrogen_filter));
   return (tracing_on &&
-      OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
+      base::OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
 }
 
 } }  // namespace v8::internal