Add Resource Handler for creating Streams to forward to extensions

content/browser/streams/stream_handle_impl.cc

+// Copyright (c) 2013 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 "content/browser/streams/stream_handle_impl.h"
+
+#include "content/browser/streams/stream.h"
+#include "content/public/browser/browser_thread.h"
+
+namespace content {
+
+StreamHandleImpl::StreamHandleImpl(const base::WeakPtr<Stream>& stream,
+                                   const GURL& original_url,
+                                   const std::string& mime_type)
+    : stream_(stream),
+      url_(stream->url()),
+      original_url_(original_url),
+      mime_type_(mime_type),
+      stream_message_loop_(base::MessageLoopProxy::current()),
+      callback_message_loop_(NULL) {
+}
+
+StreamHandleImpl::~StreamHandleImpl() {
+  stream_message_loop_->PostTask(FROM_HERE,
+                                 base::Bind(&Stream::CloseHandle, stream_));
+}
+
+void StreamHandleImpl::OnStreamConsumed() {
+  base::AutoLock lock(callback_lock_);
+  stream_.reset();
+  if (!callback_.is_null()) {
+    CHECK(callback_message_loop_);
+    callback_message_loop_->PostTask(FROM_HERE, callback_);
+  }
+}
+
+const GURL& StreamHandleImpl::GetURL() {
+  return url_;
+}
+
+const GURL& StreamHandleImpl::GetOriginalURL() {
+  return original_url_;
+}
+
+const std::string& StreamHandleImpl::GetMimeType() {
+  return mime_type_;
+}
+
+void StreamHandleImpl::NotifyWhenConsumed(const base::Closure& callback) {
+  base::AutoLock lock(callback_lock_);
+  if (stream_) {
+    callback_ = callback;
+    callback_message_loop_ = base::MessageLoopProxy::current();
+  } else {
+    // If the stream is NULL, the close event has already been sent.
+    base::MessageLoopProxy::current()->PostTask(FROM_HERE, callback);
+  }
+}
+
+}  // namespace content