Separate mojo/shell into a runner and the application manager (shell)

mojo/shell/application_manager/fetcher.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 "mojo/shell/application_manager/fetcher.h"
-
-#include "url/gurl.h"
-
-namespace mojo {
-namespace shell {
-
-const char Fetcher::kMojoMagic[] = "#!mojo ";
-const size_t Fetcher::kMaxShebangLength = 2048;
-
-Fetcher::Fetcher(const FetchCallback& loader_callback)
-    : loader_callback_(loader_callback) {
-}
-
-Fetcher::~Fetcher() {
-}
-
-bool Fetcher::PeekContentHandler(std::string* mojo_shebang,
-                                 GURL* mojo_content_handler_url) {
-  // TODO(aa): I guess this should just go in ApplicationManager now.
-  std::string shebang;
-  if (HasMojoMagic() && PeekFirstLine(&shebang)) {
-    GURL url(shebang.substr(arraysize(kMojoMagic) - 1, std::string::npos));
-    if (url.is_valid()) {
-      *mojo_shebang = shebang;
-      *mojo_content_handler_url = url;
-      return true;
-    }
-  }
-  return false;
-}
-
-}  // namespace shell
-}  // namespace mojo