[stubs] Remove StringIndexOfChar

src/code-stub-assembler.h

 // Copyright 2016 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_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
@@ skipping 709 matching lines @@
   // Check if |var_string| has an indirect (thin or flat cons) string type,
   // and unpack it if so.
   void MaybeDerefIndirectString(Variable* var_string, Node* instance_type,
                                 Variable* var_did_something);
   // Check if |var_left| or |var_right| has an indirect (thin or flat cons)
   // string type, and unpack it/them if so. Fall through if nothing was done.
   void MaybeDerefIndirectStrings(Variable* var_left, Node* left_instance_type,
                                  Variable* var_right, Node* right_instance_type,
                                  Label* did_something);
 
-  // Return the first index >= {from} at which {needle_char} was found in
-  // {string}, or -1 if such an index does not exist. The returned value is
-  // a Smi, {string} is expected to be a String, {needle_char} is an intptr,
-  // and {from} is expected to be tagged.
-  Node* StringIndexOfChar(Node* context, Node* string, Node* needle_char,
-                          Node* from);
-
   Node* StringFromCodePoint(Node* codepoint, UnicodeEncoding encoding);
 
   // Type conversion helpers.
   // Convert a String to a Number.
   Node* StringToNumber(Node* context, Node* input);
   Node* NumberToString(Node* context, Node* input);
   // Convert an object to a name.
   Node* ToName(Node* context, Node* input);
   // Convert a Non-Number object to a Number.
   Node* NonNumberToNumber(Node* context, Node* input);
@@ skipping 571 matching lines @@
   }
 #else
 #define CSA_SLOW_ASSERT(csa, x) ((void)0)
 #endif
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_