Adding a SetRAILMode API.

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 <queue>
 #include <set>
 
@@ skipping 1092 matching lines @@
   CancelableTaskManager* cancelable_task_manager() {
     return cancelable_task_manager_;
   }
 
   interpreter::Interpreter* interpreter() const { return interpreter_; }
 
   base::AccountingAllocator* allocator() { return &allocator_; }
 
   bool IsInAnyContext(Object* object, uint32_t index);
 
+  void SetRAILMode(RAILMode rail_mode);
+
  protected:
   explicit Isolate(bool enable_serializer);
   bool IsArrayOrObjectPrototype(Object* object);
 
  private:
   friend struct GlobalState;
   friend struct InitializeGlobalState;
   Handle<JSObject> SetUpSubregistry(Handle<JSObject> registry, Handle<Map> map,
                                     const char* name);
 
@@ skipping 91 matching lines @@
   // If there is no external try-catch or message was successfully propagated,
   // then return true.
   bool PropagatePendingExceptionToExternalTryCatch();
 
   // Remove per-frame stored materialized objects when we are unwinding
   // the frame.
   void RemoveMaterializedObjectsOnUnwind(StackFrame* frame);
 
   void RunMicrotasksInternal();
 
+  const char* RAILModeName(RAILMode rail_mode) const {
+    switch (rail_mode) {
+      case PERFORMANCE_DEFAULT:
+        return "DEFAULT";
+      case PERFORMANCE_RESPONSE:
+        return "RESPONSE";
+      case PERFORMANCE_ANIMATION:
+        return "ANIMATION";
+      case PERFORMANCE_IDLE:
+        return "IDLE";
+      case PERFORMANCE_LOAD:
+        return "LOAD";
+      default:
+        UNREACHABLE();
+    }
+    return "";
+  }
+
   base::Atomic32 id_;
   EntryStackItem* entry_stack_;
   int stack_trace_nesting_level_;
   StringStream* incomplete_message_;
   Address isolate_addresses_[kIsolateAddressCount + 1];  // NOLINT
   Bootstrapper* bootstrapper_;
   RuntimeProfiler* runtime_profiler_;
   CompilationCache* compilation_cache_;
   Counters* counters_;
   base::RecursiveMutex break_access_;
@@ skipping 26 matching lines @@
   Builtins builtins_;
   bool has_installed_extensions_;
   unibrow::Mapping<unibrow::Ecma262UnCanonicalize> jsregexp_uncanonicalize_;
   unibrow::Mapping<unibrow::CanonicalizationRange> jsregexp_canonrange_;
   unibrow::Mapping<unibrow::Ecma262Canonicalize>
       regexp_macro_assembler_canonicalize_;
   RegExpStack* regexp_stack_;
   DateCache* date_cache_;
   CallInterfaceDescriptorData* call_descriptor_data_;
   base::RandomNumberGenerator* random_number_generator_;
+  RAILMode rail_mode_;
 
   // Whether the isolate has been created for snapshotting.
   bool serializer_enabled_;
 
   // True if fatal error has been signaled for this isolate.
   bool has_fatal_error_;
 
   // True if this isolate was initialized from a snapshot.
   bool initialized_from_snapshot_;
 
@@ skipping 313 matching lines @@
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ISOLATE_H_