Continue to clean c_str() calls.

content/browser/devtools/devtools_http_handler.cc

Index: content/browser/devtools/devtools_http_handler.cc
diff --git a/content/browser/devtools/devtools_http_handler.cc b/content/browser/devtools/devtools_http_handler.cc
index 22dbbadd83ea689168b94bbc03898b874beb7259..b4e475d6d457d8888586cbc4766d1b18606ee18e 100644
--- a/content/browser/devtools/devtools_http_handler.cc
+++ b/content/browser/devtools/devtools_http_handler.cc
@@ -521,7 +521,7 @@ void DevToolsHttpHandler::OnJsonRequest(
   if (command == "version") {
     base::DictionaryValue version;
     version.SetString("Protocol-Version",
-        DevToolsAgentHost::GetProtocolVersion().c_str());
+                      DevToolsAgentHost::GetProtocolVersion());
     version.SetString("WebKit-Version", GetWebKitVersion());
     version.SetString("Browser", product_name_);
     version.SetString("User-Agent", user_agent_);
@@ -852,9 +852,7 @@ std::unique_ptr<base::DictionaryValue> DevToolsHttpHandler::SerializeDescriptor(
                                              host.c_str(),
                                              kPageUrlPrefix,
                                              id.c_str()));
-    std::string devtools_frontend_url = GetFrontendURLInternal(
-        id.c_str(),
-        host);
+    std::string devtools_frontend_url = GetFrontendURLInternal(id, host);
     dictionary->SetString(
         kTargetDevtoolsFrontendUrlField, devtools_frontend_url);
   }