Enable posting a message from JS to Android webview.

android_webview/browser/aw_message_port_message_filter.cc

Index: android_webview/browser/aw_message_port_message_filter.cc
diff --git a/android_webview/browser/aw_message_port_message_filter.cc b/android_webview/browser/aw_message_port_message_filter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..74b1aa5ffb9e45936e9faa12b34d28a1975bd6e2
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+++ b/android_webview/browser/aw_message_port_message_filter.cc
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+// Copyright 2015 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 "android_webview/browser/aw_message_port_message_filter.h"
+
+#include "android_webview/browser/aw_browser_context.h"
+#include "android_webview/common/aw_message_port_messages.h"
+#include "content/public/browser/message_port_provider.h"
+
+using content::BrowserThread;
+using content::MessagePortProvider;
+
+namespace android_webview {
+
+AwMessagePortMessageFilter::AwMessagePortMessageFilter(int route_id)
+    : BrowserMessageFilter(AwMessagePortMsgStart), route_id_(route_id) {
+}
+
+AwMessagePortMessageFilter::~AwMessagePortMessageFilter() {
+}
+
+void AwMessagePortMessageFilter::OnChannelClosing() {
+  MessagePortProvider::OnMessagePortDelegateClosing(this);
+  AwBrowserContext::GetDefault()->GetMessagePortService()->
+      OnMessagePortMessageFilterClosing(this);
+}
+
+bool AwMessagePortMessageFilter::OnMessageReceived(
+    const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(AwMessagePortMessageFilter, message)
+    IPC_MESSAGE_FORWARD(AwMessagePortHostMsg_ConvertedMessage,
+                        AwBrowserContext::GetDefault()->GetMessagePortService(),
+                        AwMessagePortService::OnConvertedMessage)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void AwMessagePortMessageFilter::OnDestruct() const {
+  BrowserThread::DeleteOnIOThread::Destruct(this);
+}
+
+void AwMessagePortMessageFilter::SendMessage(
+    int msg_port_route_id,
+    const base::string16& message,
+    const std::vector<int>& sent_message_port_ids) {
+  Send(new AwMessagePortMsg_Message(route_id_,
+                                    msg_port_route_id, // same as the port id
+                                    message,
+                                    sent_message_port_ids));
+}
+
+void AwMessagePortMessageFilter::SendMessagesAreQueued(int route_id) {
+  // TODO(sgurun) implement
+  NOTREACHED();
+}
+
+}   // namespace android_webview