[Bindings] Create and use V8 context snapshots

third_party/WebKit/public/platform/Platform.h

Index: third_party/WebKit/public/platform/Platform.h
diff --git a/third_party/WebKit/public/platform/Platform.h b/third_party/WebKit/public/platform/Platform.h
index 2acc45ecce37f52171cecc484538ef6abe503e77..4b87188a41cf55988280c8d988dc2a7111cdc005 100644
--- a/third_party/WebKit/public/platform/Platform.h
+++ b/third_party/WebKit/public/platform/Platform.h
@@ -701,6 +701,13 @@ class BLINK_PLATFORM_EXPORT Platform {
   // depending on memory pressure.
   virtual void RequestPurgeMemory() {}
 
+  // V8 Context Snapshot --------------------------------------------------
+
+  // This method returns true only when
+  // tools/v8_context_snapshot/v8_context_snapshot_generator is running (which
+  // runs during Chromium's build step).
+  virtual bool IsTakingV8ContextSnapshot() { return false; }
+
   // Feature Policy -----------------------------------------------------
 
   // Create a new feature policy object for a document, given its parent