Cast channel: Add cast.channel.getLogs extension API.

extensions/browser/api/cast_channel/cast_channel_api.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 "extensions/browser/api/cast_channel/cast_channel_api.h"
 
 #include <limits>
 #include <string>
 
 #include "base/json/json_writer.h"
@@ skipping 435 matching lines @@
                        cast_channel::CHANNEL_ERROR_SOCKET_ERROR);
   } else {
     SetResultFromSocket(*socket);
     // This will delete |socket|.
     RemoveSocket(channel_id);
     socket = NULL;
   }
   AsyncWorkCompleted();
 }
 
+CastChannelGetLogsFunction::CastChannelGetLogsFunction() {
+}
+
+CastChannelGetLogsFunction::~CastChannelGetLogsFunction() {
+}
+
+bool CastChannelGetLogsFunction::PrePrepare() {
+  api_ = CastChannelAPI::Get(browser_context());
+  return CastChannelAsyncApiFunction::PrePrepare();
+}
+
+bool CastChannelGetLogsFunction::Prepare() {
+  return true;
+}
+
+void CastChannelGetLogsFunction::AsyncWorkStart() {
+  DCHECK(api_);
+
+  int length = 0;
+  scoped_ptr<char[]> out = api_->GetLogger()->GetLogs(&length);
+  if (out.get()) {
+    SetResult(new base::BinaryValue(out.Pass(), length));
+  } else {
+    SetError("Unable to get logs.");
+  }
+
+  api_->GetLogger()->Reset();
+
+  AsyncWorkCompleted();
+}
+
 }  // namespace extensions