[DevTools]: Expose V8 version in /json/version

android_webview/native/aw_devtools_server.cc

Index: android_webview/native/aw_devtools_server.cc
diff --git a/android_webview/native/aw_devtools_server.cc b/android_webview/native/aw_devtools_server.cc
index 9ced44b6430ac132c6cdea1f0550b2a2fdc4c18a..9fc16542e02f52f85f671e6b4b76f4fbe2778c10 100644
--- a/android_webview/native/aw_devtools_server.cc
+++ b/android_webview/native/aw_devtools_server.cc
@@ -24,6 +24,7 @@
 #include "jni/AwDevToolsServer_jni.h"
 #include "net/base/net_errors.h"
 #include "net/socket/unix_domain_server_socket_posix.h"
+#include "v8/include/v8.h"
 
 using base::android::JavaParamRef;
 using content::DevToolsAgentHost;
@@ -101,7 +102,7 @@ void AwDevToolsServer::Start() {
       std::move(factory),
       base::StringPrintf(kFrontEndURL, content::GetWebKitRevision().c_str()),
       base::FilePath(), base::FilePath(),
-      GetProduct(), GetUserAgent());
+      GetProduct(), GetUserAgent(), v8::V8::GetVersion());
 }
 
 void AwDevToolsServer::Stop() {