headless: Introduce a browser context

headless/lib/browser/headless_browser_main_parts.h

Index: headless/lib/browser/headless_browser_main_parts.h
diff --git a/headless/lib/browser/headless_browser_main_parts.h b/headless/lib/browser/headless_browser_main_parts.h
index 3b7453ecf9a5bc1db0b98d0e81c978b198d3b0bb..b0e30c397b8c7432c7a762d61244a08918ab0ddd 100644
--- a/headless/lib/browser/headless_browser_main_parts.h
+++ b/headless/lib/browser/headless_browser_main_parts.h
@@ -16,7 +16,7 @@ class DevToolsHttpHandler;
 
 namespace headless {
 
-class HeadlessBrowserContext;
+class HeadlessBrowserContextImpl;
 class HeadlessBrowserImpl;
 
 class HeadlessBrowserMainParts : public content::BrowserMainParts {
@@ -28,11 +28,11 @@ class HeadlessBrowserMainParts : public content::BrowserMainParts {
   void PreMainMessageLoopRun() override;
   void PostMainMessageLoopRun() override;
 
-  HeadlessBrowserContext* browser_context() const;
+  HeadlessBrowserContextImpl* default_browser_context() const;
 
  private:
   HeadlessBrowserImpl* browser_;  // Not owned.
-  std::unique_ptr<HeadlessBrowserContext> browser_context_;
+  std::unique_ptr<HeadlessBrowserContextImpl> browser_context_;
   std::unique_ptr<devtools_http_handler::DevToolsHttpHandler>
       devtools_http_handler_;