Provide WebContents::CreateParams to tab helpers.

chrome/browser/devtools/devtools_window.cc

Index: chrome/browser/devtools/devtools_window.cc
diff --git a/chrome/browser/devtools/devtools_window.cc b/chrome/browser/devtools/devtools_window.cc
index dc0dfd6e4dd8a7e3a9741b2d1d4474cb2288a995..0ba79b03613c3bd7496352e33f941ea05ff2ecb1 100644
--- a/chrome/browser/devtools/devtools_window.cc
+++ b/chrome/browser/devtools/devtools_window.cc
@@ -1047,12 +1047,14 @@ void DevToolsWindow::AddNewContents(WebContents* source,
   }
 }
 
-void DevToolsWindow::WebContentsCreated(WebContents* source_contents,
-                                        int opener_render_process_id,
-                                        int opener_render_frame_id,
-                                        const std::string& frame_name,
-                                        const GURL& target_url,
-                                        WebContents* new_contents) {
+void DevToolsWindow::WebContentsCreated(
+    WebContents* source_contents,
+    int opener_render_process_id,
+    int opener_render_frame_id,
+    const std::string& frame_name,
+    const GURL& target_url,
+    WebContents* new_contents,
+    const base::Optional<content::WebContents::CreateParams>& create_params) {
   if (target_url.SchemeIs(content::kChromeDevToolsScheme) &&
       target_url.path().rfind("toolbox.html") != std::string::npos) {
     CHECK(can_dock_);