Revert "Remove deprecated ShouldSelfOptimize machinery."

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/ast-numbering.h"
 #include "src/bootstrapper.h"
@@ skipping 258 matching lines @@
     return Code::ComputeFlags(code_stub()->GetCodeKind(),
                               code_stub()->GetICState(),
                               code_stub()->GetExtraICState(),
                               code_stub()->GetStubType());
   } else {
     return Code::ComputeFlags(Code::OPTIMIZED_FUNCTION);
   }
 }
 
 
+// Primitive functions are unlikely to be picked up by the stack-walking
+// profiler, so they trigger their own optimization when they're called
+// for the SharedFunctionInfo::kCallsUntilPrimitiveOptimization-th time.
+bool CompilationInfo::ShouldSelfOptimize() {
+  return FLAG_crankshaft &&
+      !function()->flags()->Contains(kDontSelfOptimize) &&
+      !function()->dont_optimize() &&
+      function()->scope()->AllowsLazyCompilation() &&
+      (shared_info().is_null() || !shared_info()->optimization_disabled());
+}
+
+
 void CompilationInfo::PrepareForCompilation(Scope* scope) {
   DCHECK(scope_ == NULL);
   scope_ = scope;
 }
 
 
 void CompilationInfo::EnsureFeedbackVector() {
   if (feedback_vector_.is_null()) {
     feedback_vector_ = isolate()->factory()->NewTypeFeedbackVector(
         function()->slot_count(), function()->ic_slot_count());
@@ skipping 1198 matching lines @@
   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 &&
       base::OS::StrChr(const_cast<char*>(FLAG_trace_phase), name_[0]) != NULL);
 }
 
 } }  // namespace v8::internal