DevTools: allow reattaching main target live.

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 2c5a4e70bf09c1f502dc015ac8519b29a3ac8801..1624b2d165d8662a845aef26f61382924b62bffd 100644
--- a/chrome/browser/devtools/devtools_window.cc
+++ b/chrome/browser/devtools/devtools_window.cc
@@ -945,11 +945,7 @@ WebContents* DevToolsWindow::OpenURLFromTab(
     return inspected_web_contents ?
         inspected_web_contents->OpenURL(params) : NULL;
   }
-
-  bindings_->Reattach();
-
-  content::NavigationController::LoadURLParams load_url_params(params.url);
-  main_web_contents_->GetController().LoadURLWithParams(load_url_params);
+  bindings_->Reload();
   return main_web_contents_;
 }