Move string-related runtime functions into separate files.

src/runtime/runtime.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_RUNTIME_H_
 #define V8_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/zone.h"
 
@@ skipping 804 matching lines @@
   // Get the intrinsic function with the given FunctionId.
   static const Function* FunctionForId(FunctionId id);
 
   // Get the intrinsic function with the given function entry address.
   static const Function* FunctionForEntry(Address ref);
 
   // General-purpose helper functions for runtime system.
   static int StringMatch(Isolate* isolate, Handle<String> sub,
                          Handle<String> pat, int index);
 
-  static bool IsUpperCaseChar(RuntimeState* runtime_state, uint16_t ch);
-
   // TODO(1240886): Some of the following methods are *not* handle safe, but
   // accept handle arguments. This seems fragile.
 
   // Support getting the characters in a string using [] notation as
   // in Firefox/SpiderMonkey, Safari and Opera.
   MUST_USE_RESULT static MaybeHandle<Object> GetElementOrCharAt(
       Isolate* isolate, Handle<Object> object, uint32_t index);
 
   MUST_USE_RESULT static MaybeHandle<Object> SetObjectProperty(
       Isolate* isolate, Handle<Object> object, Handle<Object> key,
@@ skipping 61 matching lines @@
 class AllocateDoubleAlignFlag : public BitField<bool, 0, 1> {};
 class AllocateTargetSpace : public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 class DeclareGlobalsStrictMode : public BitField<StrictMode, 2, 1> {};
 }
 }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_