Add a mimeHandler extension API.

extensions/browser/api/mime_handler/mime_handler.cc

+// 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 "extensions/browser/api/mime_handler/mime_handler.h"
+
+#include "content/public/browser/stream_handle.h"
+#include "content/public/browser/stream_info.h"
+#include "extensions/browser/guest_view/mime_handler_view/mime_handler_view_guest.h"
+#include "extensions/common/constants.h"
+#include "mojo/public/cpp/bindings/map.h"
+#include "net/http/http_response_headers.h"
+
+namespace extensions {
+namespace {
+
+mojo::Map<mojo::String, mojo::String> CreateResponseHeadersMap(
+    const net::HttpResponseHeaders* headers) {
+  std::map<std::string, std::string> result;
+  if (!headers)
+    return mojo::Map<mojo::String, mojo::String>::From(result);
+
+  void* iter = nullptr;
+  std::string header_name;
+  std::string header_value;
+  while (headers->EnumerateHeaderLines(&iter, &header_name, &header_value)) {
+    auto& current_value = result[header_name];
+    if (!current_value.empty())
+      current_value += ", ";
+    current_value += header_value;
+  }
+  return mojo::Map<mojo::String, mojo::String>::From(result);
+}
+
+}  // namespace
+
+// static
+void MimeHandlerServiceImpl::Create(
+    base::WeakPtr<StreamContainer> stream_container,
+    mojo::InterfaceRequest<mime_handler::MimeHandlerService> request) {
+  mojo::BindToRequest(new MimeHandlerServiceImpl(stream_container), &request);
+}
+
+MimeHandlerServiceImpl::MimeHandlerServiceImpl(
+    base::WeakPtr<StreamContainer> stream_container)
+    : stream_(stream_container) {
+}
+
+MimeHandlerServiceImpl::~MimeHandlerServiceImpl() {
+}
+
+void MimeHandlerServiceImpl::GetStreamInfo(
+    const mojo::Callback<void(mime_handler::StreamInfoPtr)>& callback) {
+  if (!stream_ || !stream_->stream_info()->handle) {
+    callback.Run(mime_handler::StreamInfoPtr());
+    return;
+  }
+  auto info = stream_->stream_info();

[raymes, 2015/01/12 05:26:04]

Please add a type converter as discussed :)

[Sam McNally, 2015/01/12 07:13:35]

Done.

+  auto stream_info = mime_handler::StreamInfo::New();
+  stream_info->embedded = stream_->embedded();
+  stream_info->tab_id = stream_->tab_id();
+  stream_info->mime_type = info->mime_type;
+  stream_info->original_url = info->original_url.spec();
+  stream_info->stream_url = info->handle->GetURL().spec();
+  stream_info->expected_content_size = stream_->expected_content_size();
+  stream_info->response_headers =
+      CreateResponseHeadersMap(stream_->stream_info()->response_headers.get());
+  callback.Run(stream_info.Pass());
+}
+
+void MimeHandlerServiceImpl::AbortStream(
+    const mojo::Callback<void()>& callback) {
+  stream_->Abort();
+  callback.Run();
+}
+
+}  // namespace extensions