Revert "[turbofan] Add new JSFrameSpecialization reducer."

src/runtime/runtime-compiler.cc

Index: src/runtime/runtime-compiler.cc
diff --git a/src/runtime/runtime-compiler.cc b/src/runtime/runtime-compiler.cc
index 0b6677a0433256df9631cb416330f7344abfc4b0..ba92faa3fafe1bca55007012429250f266be7555 100644
--- a/src/runtime/runtime-compiler.cc
+++ b/src/runtime/runtime-compiler.cc
@@ -219,12 +219,11 @@ RUNTIME_FUNCTION(Runtime_CompileForOnStackReplacement) {
   BailoutId ast_id = caller_code->TranslatePcOffsetToAstId(pc_offset);
   DCHECK(!ast_id.IsNone());
 
-  // Disable concurrent OSR for asm.js, to enable frame specialization.
-  Compiler::ConcurrencyMode mode = (isolate->concurrent_osr_enabled() &&
-                                    !function->shared()->asm_function() &&
-                                    function->shared()->ast_node_count() > 512)
-                                       ? Compiler::CONCURRENT
-                                       : Compiler::NOT_CONCURRENT;
+  Compiler::ConcurrencyMode mode =
+      isolate->concurrent_osr_enabled() &&
+              (function->shared()->ast_node_count() > 512)
+          ? Compiler::CONCURRENT
+          : Compiler::NOT_CONCURRENT;
   Handle<Code> result = Handle<Code>::null();
 
   OptimizedCompileJob* job = NULL;
@@ -259,9 +258,8 @@ RUNTIME_FUNCTION(Runtime_CompileForOnStackReplacement) {
       function->PrintName();
       PrintF(" at AST id %d]\n", ast_id.ToInt());
     }
-    MaybeHandle<Code> maybe_result = Compiler::GetOptimizedCode(
-        function, caller_code, mode, ast_id,
-        (mode == Compiler::NOT_CONCURRENT) ? frame : nullptr);
+    MaybeHandle<Code> maybe_result =
+        Compiler::GetOptimizedCode(function, caller_code, mode, ast_id);
     if (maybe_result.ToHandle(&result) &&
         result.is_identical_to(isolate->builtins()->InOptimizationQueue())) {
       // Optimization is queued.  Return to check later.