Reland "Keep a canonical list of shared function infos."

src/codegen.h

 // 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.
 
 #ifndef V8_CODEGEN_H_
 #define V8_CODEGEN_H_
 
 #include "src/code-stubs.h"
 #include "src/runtime/runtime.h"
 
@@ skipping 14 matching lines @@
 //   in_spilled_code
 //   set_in_spilled_code
 //   RecordPositions
 //
 // These methods are either used privately by the shared code or implemented as
 // shared code:
 //   CodeGenerator
 //   ~CodeGenerator
 //   Generate
 //   ComputeLazyCompile
-//   BuildFunctionInfo
 //   ProcessDeclarations
 //   DeclareGlobals
 //   CheckForInlineRuntimeCall
 //   AnalyzeCondition
 //   CodeForFunctionPosition
 //   CodeForReturnPosition
 //   CodeForStatementPosition
 //   CodeForDoWhileConditionPosition
 //   CodeForSourcePosition
 
@@ skipping 128 matching lines @@
 #ifdef DEBUG
 #ifdef V8_TARGET_ARCH_ARM64
   const EmbeddedVector<byte, kNoCodeAgeSequenceLength> old_sequence_;
 #endif
 #endif
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODEGEN_H_