Implement V8Platform::CallDelayedOnForegroundThread.

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 a4fc28a9bc32cf394af4027cddfc116a85219fd1..3e90059cb792202c9a62fa0153fa2d01ef694a54 100644
--- a/gin/public/v8_platform.h
+++ b/gin/public/v8_platform.h
@@ -23,6 +23,11 @@ class GIN_EXPORT V8Platform : public NON_EXPORTED_BASE(v8::Platform) {
       v8::Task* task,
       v8::Platform::ExpectedRuntime expected_runtime) override;
   void CallOnForegroundThread(v8::Isolate* isolate, v8::Task* task) override;
+  // TODO(ulan): Replace 'virtual' with 'override' once the corresponding change
+  // in V8 rolls in chromium.
+  virtual void CallDelayedOnForegroundThread(v8::Isolate* isolate,
+                                             v8::Task* task,
+                                             double delay_in_seconds);
   double MonotonicallyIncreasingTime() override;
 
  private: