[runtime] Remove SharedFunctionInfo::is_function which is the inverse of SFI::is_toplevel

src/objects.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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 #include <memory>
 
@@ skipping 7440 matching lines @@
   // Though it's anonymous, toString should treat it as if it had the name
   // "anonymous".  We don't set the name itself so that the system does not
   // see a binding for it.
   DECL_BOOLEAN_ACCESSORS(name_should_print_as_anonymous)
 
   // Indicates that the function is either an anonymous expression
   // or an arrow function (the name field can be set through the API,
   // which does not change this flag).
   DECL_BOOLEAN_ACCESSORS(is_anonymous_expression)
 
-  // Is this a function or top-level/eval code.
-  DECL_BOOLEAN_ACCESSORS(is_function)
-
   // Indicates that code for this function must be compiled through the
   // Ignition / TurboFan pipeline, and is unsupported by
   // FullCodegen / Crankshaft.
   DECL_BOOLEAN_ACCESSORS(must_use_ignition_turbo)
 
   // Indicates that code for this function cannot be flushed.
   DECL_BOOLEAN_ACCESSORS(dont_flush)
 
   // Indicates that this function is an asm function.
   DECL_BOOLEAN_ACCESSORS(asm_function)
@@ skipping 279 matching lines @@
     kHasDuplicateParameters,
     kNative,
     kStrictModeFunction,
     kUsesArguments,
     kNeedsHomeObject,
     // byte 1
     kForceInline,
     kIsAsmFunction,
     kIsAnonymousExpression,
     kNameShouldPrintAsAnonymous,
-    kIsFunction,
     kMustUseIgnitionTurbo,
     kDontFlush,
     kIsDeclaration,
+
+    kUnused,  // unused.
     // byte 2
     kFunctionKind,
     // rest of byte 2 and first two bits of byte 3 are used by FunctionKind
     // byte 3
     kDeserialized = kFunctionKind + 10,
     kIsAsmWasmBroken,
     kCompilerHintsCount,  // Pseudo entry
   };
   // kFunctionKind has to be byte-aligned
   STATIC_ASSERT((kFunctionKind % kBitsPerByte) == 0);
@@ skipping 3971 matching lines @@
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #include "src/objects/object-macros-undef.h"
 
 #endif  // V8_OBJECTS_H_