Track Hydrogen statistics on a per-Isolate basis

src/compiler.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 216 matching lines @@
 
     compilation_time += (ms_creategraph + ms_optimize + ms_codegen);
     compiled_functions++;
     code_size += function->shared()->SourceSize();
     PrintF("Compiled: %d functions with %d byte source size in %fms.\n",
            compiled_functions,
            code_size,
            compilation_time);
   }
   if (FLAG_hydrogen_stats) {
-    HStatistics::Instance()->IncrementSubtotals(time_taken_to_create_graph_,
-                                                time_taken_to_optimize_,
-                                                time_taken_to_codegen_);
+    isolate()->GetHStatistics()->IncrementSubtotals(time_taken_to_create_graph_,
+                                                    time_taken_to_optimize_,
+                                                    time_taken_to_codegen_);
   }
 }
 
 
 // A return value of true indicates the compilation pipeline is still
 // going, not necessarily that we optimized the code.
 static bool MakeCrankshaftCode(CompilationInfo* info) {
   OptimizingCompiler compiler(info);
   OptimizingCompiler::Status status = compiler.CreateGraph();
 
@@ skipping 881 matching lines @@
     }
   }
 
   GDBJIT(AddCode(Handle<String>(shared->DebugName()),
                  Handle<Script>(info->script()),
                  Handle<Code>(info->code()),
                  info));
 }
 
 } }  // namespace v8::internal