DevTools: create test infrastructure so devtools drives the test

content/shell/browser/layout_test/layout_test_devtools_bindings.h

Index: content/shell/browser/layout_test/layout_test_devtools_bindings.h
diff --git a/content/shell/browser/layout_test/layout_test_devtools_bindings.h b/content/shell/browser/layout_test/layout_test_devtools_bindings.h
index 1b443e160ef5b80ec0f43ef0eb1e1c2de065a277..bf9a34faa19694b5a56698d9797c561e8a621198 100644
--- a/content/shell/browser/layout_test/layout_test_devtools_bindings.h
+++ b/content/shell/browser/layout_test/layout_test_devtools_bindings.h
@@ -17,7 +17,8 @@ class LayoutTestDevToolsBindings : public ShellDevToolsBindings {
  public:
   static GURL GetDevToolsPathAsURL(const std::string& frontend_url);
 
-  static GURL MapJSTestURL(const GURL& test_url);
+  static GURL MapTestURLIfNeeded(const GURL& test_url,
+                                 bool* is_devtools_js_test);
 
   static LayoutTestDevToolsBindings* LoadDevTools(
       WebContents* devtools_contents_,
@@ -29,6 +30,9 @@ class LayoutTestDevToolsBindings : public ShellDevToolsBindings {
   ~LayoutTestDevToolsBindings() override;
 
  private:
+  static GURL MapJSTestURL(const GURL& test_url,
+                           const std::string& entry_filename);
+
   LayoutTestDevToolsBindings(WebContents* devtools_contents,
                              WebContents* inspected_contents);