Revert of [Parser] Introduce AstStringConstants to share constants across AstValueFactory

src/isolate.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_ISOLATE_H_
 #define V8_ISOLATE_H_
 
 #include <memory>
 #include <queue>
 
@@ skipping 17 matching lines @@
 namespace v8 {
 
 namespace base {
 class RandomNumberGenerator;
 }
 
 namespace internal {
 
 class AccessCompilerData;
 class AddressToIndexHashMap;
-class AstStringConstants;
 class BasicBlockProfiler;
 class Bootstrapper;
 class CancelableTaskManager;
 class CallInterfaceDescriptorData;
 class CodeAgingHelper;
 class CodeEventDispatcher;
 class CodeGenerator;
 class CodeRange;
 class CodeStubDescriptor;
 class CodeTracer;
@@ skipping 1102 matching lines @@
   v8::ArrayBuffer::Allocator* array_buffer_allocator() const {
     return array_buffer_allocator_;
   }
 
   FutexWaitListNode* futex_wait_list_node() { return &futex_wait_list_node_; }
 
   CancelableTaskManager* cancelable_task_manager() {
     return cancelable_task_manager_;
   }
 
-  AstStringConstants* ast_string_constants() const {
-    return ast_string_constants_;
-  }
-
   interpreter::Interpreter* interpreter() const { return interpreter_; }
 
   AccountingAllocator* allocator() { return allocator_; }
 
   CompilerDispatcher* compiler_dispatcher() const {
     return compiler_dispatcher_;
   }
 
   // Clear all optimized code stored in native contexts.
   void ClearOSROptimizedCode();
@@ skipping 222 matching lines @@
   HistogramInfo heap_histograms_[LAST_TYPE + 1];
   JSObject::SpillInformation js_spill_information_;
 #endif
 
   Debug* debug_;
   CpuProfiler* cpu_profiler_;
   HeapProfiler* heap_profiler_;
   std::unique_ptr<CodeEventDispatcher> code_event_dispatcher_;
   FunctionEntryHook function_entry_hook_;
 
-  AstStringConstants* ast_string_constants_;
-
   interpreter::Interpreter* interpreter_;
 
   CompilerDispatcher* compiler_dispatcher_;
 
   typedef std::pair<InterruptCallback, void*> InterruptEntry;
   std::queue<InterruptEntry> api_interrupts_queue_;
 
 #define GLOBAL_BACKING_STORE(type, name, initialvalue)                         \
   type name##_;
   ISOLATE_INIT_LIST(GLOBAL_BACKING_STORE)
@@ skipping 283 matching lines @@
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ISOLATE_H_