NotForReview: Expose the global memory budget (chromium side)

gin/public/v8_platform.h

Index: gin/public/v8_platform.h
diff --git a/gin/public/v8_platform.h b/gin/public/v8_platform.h
index 2eee1dd1b7b42b39a8277686c1169dfe599e6dac..f2fd2b7c0f1ccb61a4d22191cdbc4ac87fe099b3 100644
--- a/gin/public/v8_platform.h
+++ b/gin/public/v8_platform.h
@@ -54,6 +54,10 @@ class GIN_EXPORT V8Platform : public NON_EXPORTED_BASE(v8::Platform) {
   void AddTraceStateObserver(v8::Platform::TraceStateObserver*) override;
   void RemoveTraceStateObserver(v8::Platform::TraceStateObserver*) override;
 
+  bool IsGlobalMemoryBudgetAvailable() override;
+  int64_t GetGlobalMemoryBudget() override;
+  void SetGlobalMemoryBudgetUpdateInterval(uint32_t interval_ms) override;
+
  private:
   friend struct base::LazyInstanceTraitsBase<V8Platform>;