[DevTools] Load DevTools frontend without iframe (chromium part).

content/renderer/devtools/devtools_agent.cc

Index: content/renderer/devtools/devtools_agent.cc
diff --git a/content/renderer/devtools/devtools_agent.cc b/content/renderer/devtools/devtools_agent.cc
index 9b627e0675b146c9fb64643c8891a7c27ea2c388..c9fe342befd61db2cbd550be27929bb729c46f80 100644
--- a/content/renderer/devtools/devtools_agent.cc
+++ b/content/renderer/devtools/devtools_agent.cc
@@ -261,13 +261,14 @@ void DevToolsAgent::ContinueProgram() {
     web_agent->continueProgram();
 }
 
-void DevToolsAgent::OnSetupDevToolsClient() {
+void DevToolsAgent::OnSetupDevToolsClient(
+    const std::string& compatibility_script) {
   // We only want to register once; and only in main frame.
   DCHECK(!frame_->GetWebFrame() || !frame_->GetWebFrame()->parent());
   if (is_devtools_client_)
     return;
   is_devtools_client_ = true;
-  new DevToolsClient(frame_);
+  new DevToolsClient(frame_, compatibility_script);
 }
 
 WebDevToolsAgent* DevToolsAgent::GetWebAgent() {