Remove inline header includes from non-inline headers (2).

src/compiler/js-frame-specialization.h

 // Copyright 2015 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.
 
 #ifndef V8_COMPILER_JS_FRAME_SPECIALIZATION_H_
 #define V8_COMPILER_JS_FRAME_SPECIALIZATION_H_
 
 #include "src/compiler/graph-reducer.h"
 
 namespace v8 {
 namespace internal {
+
+// Forward declarations.
+class JavaScriptFrame;
+
 namespace compiler {
 
 // Forward declarations.
 class JSGraph;
 
 
 class JSFrameSpecialization final : public Reducer {
  public:
   JSFrameSpecialization(JavaScriptFrame const* frame, JSGraph* jsgraph)
       : frame_(frame), jsgraph_(jsgraph) {}
@@ skipping 13 matching lines @@
   JSGraph* const jsgraph_;
 
   DISALLOW_COPY_AND_ASSIGN(JSFrameSpecialization);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_FRAME_SPECIALIZATION_H_