DevTools: allow storing devtools preferences on the browser side.

content/shell/browser/layout_test/layout_test_devtools_frontend.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/shell/browser/layout_test/layout_test_devtools_frontend.h"
 
 #include "base/command_line.h"
 #include "base/path_service.h"
 #include "base/strings/stringprintf.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 44 matching lines @@
   if (!settings.empty())
     result = GURL(base::StringPrintf("%s?settings=%s&experiments=true",
                                      result.spec().c_str(),
                                      settings.c_str()));
   return result;
 }
 
 void LayoutTestDevToolsFrontend::ReuseFrontend(const std::string& settings,
                                                const std::string frontend_url) {
   DisconnectFromTarget();
+  preferences()->Clear();
   frontend_shell()->LoadURL(GetDevToolsPathAsURL(settings, frontend_url));
 }
 
 LayoutTestDevToolsFrontend::LayoutTestDevToolsFrontend(
     Shell* frontend_shell,
     WebContents* inspected_contents)
     : ShellDevToolsFrontend(frontend_shell, inspected_contents) {
 }
 
 LayoutTestDevToolsFrontend::~LayoutTestDevToolsFrontend() {
 }
 
 void LayoutTestDevToolsFrontend::AgentHostClosed(
     DevToolsAgentHost* agent_host, bool replaced) {
   // Do not close the front-end shell.
 }
 
 void LayoutTestDevToolsFrontend::RenderProcessGone(
     base::TerminationStatus status) {
   WebKitTestController::Get()->DevToolsProcessCrashed();
 }
 
 }  // namespace content