[headless] Remove default browser context.

headless/lib/browser/headless_browser_main_parts.cc

Index: headless/lib/browser/headless_browser_main_parts.cc
diff --git a/headless/lib/browser/headless_browser_main_parts.cc b/headless/lib/browser/headless_browser_main_parts.cc
index c970b7907392e9329ec43a8c69f4cf846ea9f149..1b9e604895bd44b375042a5e4c2fc10c055a980f 100644
--- a/headless/lib/browser/headless_browser_main_parts.cc
+++ b/headless/lib/browser/headless_browser_main_parts.cc
@@ -8,6 +8,7 @@
 #include "headless/lib/browser/headless_browser_context_impl.h"
 #include "headless/lib/browser/headless_browser_impl.h"
 #include "headless/lib/browser/headless_devtools.h"
+#include "headless/lib/browser/headless_devtools_manager_delegate.h"
 #include "headless/lib/browser/headless_screen.h"
 #include "ui/aura/env.h"
 #include "ui/display/screen.h"
@@ -32,24 +33,17 @@ HeadlessBrowserMainParts::HeadlessBrowserMainParts(HeadlessBrowserImpl* browser)
 HeadlessBrowserMainParts::~HeadlessBrowserMainParts() {}
 
 void HeadlessBrowserMainParts::PreMainMessageLoopRun() {
-  browser_context_.reset(new HeadlessBrowserContextImpl(ProtocolHandlerMap(),
-                                                        browser_->options()));
   if (browser_->options()->devtools_endpoint.address().IsValid()) {
     devtools_http_handler_ =
-        CreateLocalDevToolsHttpHandler(browser_context_.get());
+        CreateLocalDevToolsHttpHandler(browser_->options());
   }
   PlatformInitialize();
 }
 
 void HeadlessBrowserMainParts::PostMainMessageLoopRun() {
-  browser_context_.reset();
   devtools_http_handler_.reset();
-  PlatformExit();
-}
 
-HeadlessBrowserContextImpl* HeadlessBrowserMainParts::default_browser_context()
-    const {
-  return browser_context_.get();
+  PlatformExit();
 }
 
 }  // namespace headless