Use std::string instead of mojo::String in //net.

net/proxy/mojo_proxy_resolver_factory_impl_unittest.cc

Index: net/proxy/mojo_proxy_resolver_factory_impl_unittest.cc
diff --git a/net/proxy/mojo_proxy_resolver_factory_impl_unittest.cc b/net/proxy/mojo_proxy_resolver_factory_impl_unittest.cc
index 2d08aedf0ee722c8b8c49df119536a9163e565e6..31634106ee07c1b3594dabe6a1ae218af3e1d611 100644
--- a/net/proxy/mojo_proxy_resolver_factory_impl_unittest.cc
+++ b/net/proxy/mojo_proxy_resolver_factory_impl_unittest.cc
@@ -119,9 +119,9 @@ class MojoProxyResolverFactoryImplTest
 
   void ReportResult(int32_t error) override { create_callback_.Run(error); }
 
-  void Alert(const mojo::String& message) override {}
+  void Alert(const std::string& message) override {}
 
-  void OnError(int32_t line_number, const mojo::String& message) override {}
+  void OnError(int32_t line_number, const std::string& message) override {}
 
   void ResolveDns(std::unique_ptr<HostResolver::RequestInfo> request_info,
                   interfaces::HostResolverRequestClientPtr client) override {}
@@ -142,8 +142,7 @@ TEST_F(MojoProxyResolverFactoryImplTest, DisconnectProxyResolverClient) {
   interfaces::ProxyResolverFactoryRequestClientPtr client_ptr;
   mojo::Binding<ProxyResolverFactoryRequestClient> client_binding(
       this, mojo::GetProxy(&client_ptr));
-  factory_->CreateResolver(mojo::String::From(kScriptData),
-                           mojo::GetProxy(&proxy_resolver),
+  factory_->CreateResolver(kScriptData, mojo::GetProxy(&proxy_resolver),
                            std::move(client_ptr));
   proxy_resolver.set_connection_error_handler(
       base::Bind(&MojoProxyResolverFactoryImplTest::OnConnectionError,
@@ -170,8 +169,7 @@ TEST_F(MojoProxyResolverFactoryImplTest, Error) {
   interfaces::ProxyResolverFactoryRequestClientPtr client_ptr;
   mojo::Binding<ProxyResolverFactoryRequestClient> client_binding(
       this, mojo::GetProxy(&client_ptr));
-  factory_->CreateResolver(mojo::String::From(kScriptData),
-                           mojo::GetProxy(&proxy_resolver),
+  factory_->CreateResolver(kScriptData, mojo::GetProxy(&proxy_resolver),
                            std::move(client_ptr));
   proxy_resolver.set_connection_error_handler(
       base::Bind(&MojoProxyResolverFactoryImplTest::OnConnectionError,
@@ -192,8 +190,7 @@ TEST_F(MojoProxyResolverFactoryImplTest,
   interfaces::ProxyResolverFactoryRequestClientPtr client_ptr;
   mojo::Binding<ProxyResolverFactoryRequestClient> client_binding(
       this, mojo::GetProxy(&client_ptr));
-  factory_->CreateResolver(mojo::String::From(kScriptData),
-                           mojo::GetProxy(&proxy_resolver),
+  factory_->CreateResolver(kScriptData, mojo::GetProxy(&proxy_resolver),
                            std::move(client_ptr));
   proxy_resolver.set_connection_error_handler(
       base::Bind(&MojoProxyResolverFactoryImplTest::OnConnectionError,
@@ -211,8 +208,7 @@ TEST_F(MojoProxyResolverFactoryImplTest,
   interfaces::ProxyResolverFactoryRequestClientPtr client_ptr;
   mojo::Binding<ProxyResolverFactoryRequestClient> client_binding(
       this, mojo::GetProxy(&client_ptr));
-  factory_->CreateResolver(mojo::String::From(kScriptData),
-                           mojo::GetProxy(&proxy_resolver),
+  factory_->CreateResolver(kScriptData, mojo::GetProxy(&proxy_resolver),
                            std::move(client_ptr));
   proxy_resolver.set_connection_error_handler(
       base::Bind(&MojoProxyResolverFactoryImplTest::OnConnectionError,