Added network components for blimp text input feature

blimp/client/feature/web_input_feature.cc

+// Copyright 2016 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 "blimp/client/feature/web_input_feature.h"
+
+#include <string>
+
+#include "blimp/common/create_blimp_message.h"
+#include "blimp/common/proto/blimp_message.pb.h"
+#include "net/base/net_errors.h"
+
+namespace blimp {
+namespace client {
+
+WebInputFeature::WebInputFeature() {}
+
+WebInputFeature::~WebInputFeature() {}
+
+void WebInputFeature::set_outgoing_message_processor(
+    scoped_ptr<BlimpMessageProcessor> processor) {
+  outgoing_message_processor_ = std::move(processor);
+}
+
+void WebInputFeature::SetDelegate(WebInputFeatureDelegate* delegate) {
+  delegate_ = delegate;
+}
+
+void WebInputFeature::SendImeTextToEngine(const std::string& text) {
+  ImeMessage* ime_message;
+  scoped_ptr<BlimpMessage> blimp_message = CreateBlimpMessage(&ime_message);
+  ime_message->set_ime_text(text);
+  ime_message->set_type(ImeMessage::SHOW_TEXT);
+
+  VLOG(0) << "Sending ime text to engine, ";

[nyquist, 2016/03/10 00:57:13]

Should this be VLOG(1) ?
Nit: 'IME' and extra space after punctuation. (And I think you meant period, not
comma)

+  outgoing_message_processor_->ProcessMessage(std::move(blimp_message),
+                                              net::CompletionCallback());
+}
+
+void WebInputFeature::ProcessMessage(scoped_ptr<BlimpMessage> message,
+                                     const net::CompletionCallback& callback) {
+  DCHECK(!callback.is_null());
+  DCHECK(message->type() == BlimpMessage::IME);
+
+  const ImeMessage& ime_message = message->ime();
+  int input_type = ime_message.text_input_type();
+  std::string text = ime_message.ime_text();
+
+  switch (ime_message.type()) {
+    case ImeMessage::SHOW_IME:
+      delegate_->OnImeRequested(true, input_type, text);
+      break;
+    case ImeMessage::HIDE_IME:
+      delegate_->OnImeRequested(false, input_type, text);
+      break;
+    case ImeMessage::SHOW_TEXT:
+      NOTREACHED();
+      break;
+    case ImeMessage::UNKNOWN:
+      NOTREACHED();
+  }
+
+  callback.Run(net::OK);
+}
+
+}  // namespace client
+}  // namespace blimp