Mojo C++ bindings: add a new mode to generator to use native STL/WTF types

mojo/public/cpp/bindings/tests/request_response_unittest.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 <stdint.h>
 #include <utility>
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "mojo/public/cpp/test_support/test_utils.h"
 #include "mojo/public/interfaces/bindings/tests/sample_import.mojom.h"
 #include "mojo/public/interfaces/bindings/tests/sample_interfaces.mojom.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace mojo {
 namespace test {
 namespace {
 
 class ProviderImpl : public sample::Provider {
  public:
   explicit ProviderImpl(InterfaceRequest<sample::Provider> request)
       : binding_(this, std::move(request)) {}
 
-  void EchoString(const String& a,
+  void EchoString(const std::string& a,
                   const EchoStringCallback& callback) override {
     EchoStringCallback callback_copy;
     // Make sure operator= is used.
     callback_copy = callback;
     callback_copy.Run(a);
   }
 
-  void EchoStrings(const String& a,
-                   const String& b,
+  void EchoStrings(const std::string& a,
+                   const std::string& b,
                    const EchoStringsCallback& callback) override {
     callback.Run(a, b);
   }
 
   void EchoMessagePipeHandle(
       ScopedMessagePipeHandle a,
       const EchoMessagePipeHandleCallback& callback) override {
     callback.Run(std::move(a));
   }
 
   void EchoEnum(sample::Enum a, const EchoEnumCallback& callback) override {
     callback.Run(a);
   }
 
   void EchoInt(int32_t a, const EchoIntCallback& callback) override {
     callback.Run(a);
   }
 
   Binding<sample::Provider> binding_;
 };
 
 void RecordString(std::string* storage,
                   const base::Closure& closure,
-                  String str) {
+                  const std::string& str) {
   *storage = str;
   closure.Run();
 }
 
 void RecordStrings(std::string* storage,
                    const base::Closure& closure,
-                   String a,
-                   String b) {
-  *storage = a.get() + b.get();
+                   const std::string& a,
+                   const std::string& b) {
+  *storage = a + b;
   closure.Run();
 }
 
 void WriteToMessagePipe(const char* text,
                         const base::Closure& closure,
                         ScopedMessagePipeHandle handle) {
   WriteTextMessage(handle.get(), text);
   closure.Run();
 }
 
@@ skipping 14 matching lines @@
  private:
   base::MessageLoop loop_;
 };
 
 TEST_F(RequestResponseTest, EchoString) {
   sample::ProviderPtr provider;
   ProviderImpl provider_impl(GetProxy(&provider));
 
   std::string buf;
   base::RunLoop run_loop;
-  provider->EchoString(String::From("hello"),
+  provider->EchoString("hello",
                        base::Bind(&RecordString, &buf, run_loop.QuitClosure()));
 
   run_loop.Run();
 
   EXPECT_EQ(std::string("hello"), buf);
 }
 
 TEST_F(RequestResponseTest, EchoStrings) {
   sample::ProviderPtr provider;
   ProviderImpl provider_impl(GetProxy(&provider));
 
   std::string buf;
   base::RunLoop run_loop;
-  provider->EchoStrings(
-      String::From("hello"), String::From(" world"),
-      base::Bind(&RecordStrings, &buf, run_loop.QuitClosure()));
+  provider->EchoStrings("hello", " world", base::Bind(&RecordStrings, &buf,
+                                                      run_loop.QuitClosure()));
 
   run_loop.Run();
 
   EXPECT_EQ(std::string("hello world"), buf);
 }
 
 TEST_F(RequestResponseTest, EchoMessagePipeHandle) {
   sample::ProviderPtr provider;
   ProviderImpl provider_impl(GetProxy(&provider));
 
@@ skipping 20 matching lines @@
   provider->EchoEnum(sample::Enum::VALUE,
                      base::Bind(&RecordEnum, &value, run_loop.QuitClosure()));
   run_loop.Run();
 
   EXPECT_EQ(sample::Enum::VALUE, value);
 }
 
 }  // namespace
 }  // namespace test
 }  // namespace mojo