Provide WebContents::CreateParams to tab helpers.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index 3d376c9b05bb2bc204c46f14d33e67610a3a90da..92f9f7928498fe02b3ea87d4bc43420d52c39322 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -1695,17 +1695,19 @@ bool Browser::ShouldCreateWebContents(
   return true;
 }
 
-void Browser::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 Browser::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<WebContents::CreateParams>& create_params) {
   // Adopt the WebContents now, so all observers are in place, as the network
   // requests for its initial navigation will start immediately. The WebContents
   // will later be inserted into this browser using Browser::Navigate via
   // AddNewContents.
-  TabHelpers::AttachTabHelpers(new_contents);
+  TabHelpers::AttachTabHelpers(new_contents, create_params);
 
   // Make the tab show up in the task manager.
   task_manager::WebContentsTags::CreateForTabContents(new_contents);