[turbofan] Separate JSInliningHeuristic into own class.

src/compiler/js-inlining.cc

 // Copyright 2014 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/compiler/js-inlining.h"
 
 #include "src/ast.h"
 #include "src/ast-numbering.h"
 #include "src/compiler.h"
 #include "src/compiler/all-nodes.h"
@@ skipping 228 matching lines @@
                                     jsgraph_->UndefinedConstant(),
                                     call->jsfunction(), call->frame_state());
 }
 
 
 Reduction JSInliner::Reduce(Node* node) {
   if (node->opcode() != IrOpcode::kJSCallFunction) return NoChange();
 
   JSCallFunctionAccessor call(node);
   HeapObjectMatcher match(call.jsfunction());
-  if (!match.HasValue()) return NoChange();
+  if (!match.HasValue() || !match.Value()->IsJSFunction()) return NoChange();
+  Handle<JSFunction> function = Handle<JSFunction>::cast(match.Value());
 
-  if (!match.Value()->IsJSFunction()) return NoChange();
-  Handle<JSFunction> function = Handle<JSFunction>::cast(match.Value());
-  if (mode_ == kRestrictedInlining && !function->shared()->force_inline()) {
-    return NoChange();
-  }
+  return ReduceJSCallFunction(node, function);
+}
+
+
+Reduction JSInliner::ReduceJSCallFunction(Node* node,
+                                          Handle<JSFunction> function) {
+  DCHECK_EQ(IrOpcode::kJSCallFunction, node->opcode());
+  JSCallFunctionAccessor call(node);
 
   if (function->shared()->HasDebugInfo()) {
     // Function contains break points.
     TRACE("Not inlining %s into %s because callee may contain break points\n",
           function->shared()->DebugName()->ToCString().get(),
           info_->shared_info()->DebugName()->ToCString().get());
     return NoChange();
   }
 
   // Disallow cross native-context inlining for now. This means that all parts
@@ skipping 89 matching lines @@
 
   // Remember that we inlined this function.
   info_->AddInlinedFunction(info.shared_info());
 
   return InlineCall(node, context, frame_state, start, end);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8