Revert of [api] Clean up scopes and precheck instantiations cache

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 1476 matching lines @@
   Handle<JSObject> promise_;
   PromiseOnStack* prev_;
 };
 
 
 // If the GCC version is 4.1.x or 4.2.x an additional field is added to the
 // class as a work around for a bug in the generated code found with these
 // versions of GCC. See V8 issue 122 for details.
 class SaveContext BASE_EMBEDDED {
  public:
-  explicit inline SaveContext(Isolate* isolate);
-  inline ~SaveContext();
+  explicit SaveContext(Isolate* isolate);
+  ~SaveContext();
 
   Handle<Context> context() { return context_; }
   SaveContext* prev() { return prev_; }
 
   // Returns true if this save context is below a given JavaScript frame.
   bool IsBelowFrame(StandardFrame* frame) {
     return (c_entry_fp_ == 0) || (c_entry_fp_ > frame->sp());
   }
 
-  Isolate* isolate() { return isolate_; }
-
  private:
   Isolate* const isolate_;
   Handle<Context> context_;
   SaveContext* const prev_;
   Address c_entry_fp_;
 };
 
 
 class AssertNoContextChange BASE_EMBEDDED {
 #ifdef DEBUG
@@ skipping 163 matching lines @@
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ISOLATE_H_