Revert of [DevTools] Move DispatchOnDevToolsFrontend to embedder.

content/public/browser/devtools_frontend_host.h

Index: content/public/browser/devtools_frontend_host.h
diff --git a/content/public/browser/devtools_frontend_host.h b/content/public/browser/devtools_frontend_host.h
index 3365d02fb26cd9c5c7c53fe2a4818f17fd2ca62a..2d9fd03a7dcb1f8386e01fd0a5a3c95ba5f9f63d 100644
--- a/content/public/browser/devtools_frontend_host.h
+++ b/content/public/browser/devtools_frontend_host.h
@@ -41,6 +41,11 @@
       RenderViewHost* frontend_rvh, Delegate* delegate);
 
   CONTENT_EXPORT virtual ~DevToolsFrontendHost() {}
+
+  // Dispatches message from embedder/backend to frontend.
+  // TODO(dgozman): remove and make embedder to take care of this.
+  CONTENT_EXPORT virtual void DispatchOnDevToolsFrontend(
+      const std::string& message) = 0;
 };
 
 }  // namespace content