[DevTools] Do not use "settings" query param.

content/shell/browser/shell_devtools_frontend.cc

 // Copyright 2013 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/shell_devtools_frontend.h"
 
 #include <stddef.h>
 
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
@@ skipping 175 matching lines @@
     inspect_element_at_y_ = -1;
   }
 }
 
 void ShellDevToolsFrontend::WebContentsDestroyed() {
   if (agent_host_)
     agent_host_->DetachClient(this);
   delete this;
 }
 
+void ShellDevToolsFrontend::SetPreferences(const std::string& json) {
+  preferences_.Clear();
+  if (json.empty())
+    return;
+  base::DictionaryValue* dict = nullptr;
+  std::unique_ptr<base::Value> parsed = base::JSONReader::Read(json);
+  if (!parsed || !parsed->GetAsDictionary(&dict))
+    return;
+  for (base::DictionaryValue::Iterator it(*dict); !it.IsAtEnd(); it.Advance()) {
+    if (!it.value().IsType(base::Value::TYPE_STRING))
+      continue;
+    preferences_.SetWithoutPathExpansion(it.key(), it.value().CreateDeepCopy());
+  }
+}
+
 void ShellDevToolsFrontend::HandleMessageFromDevToolsFrontend(
     const std::string& message) {
   if (!agent_host_)
     return;
   std::string method;
   base::ListValue* params = NULL;
   base::DictionaryValue* dict = NULL;
   std::unique_ptr<base::Value> parsed_message = base::JSONReader::Read(message);
   if (!parsed_message ||
       !parsed_message->GetAsDictionary(&dict) ||
@@ skipping 151 matching lines @@
   CallClientFunction("DevToolsAPI.embedderMessageAck",
                      &id_value, arg, nullptr);
 }
 
 void ShellDevToolsFrontend::AgentHostClosed(
     DevToolsAgentHost* agent_host, bool replaced) {
   frontend_shell_->Close();
 }
 
 }  // namespace content