Fix PDF load in <embed> and <object> tags (fixes issue #2727, see issue #2622)

libcef/renderer/url_loader_throttle_provider_impl.h

@@ -0,0 +1,45 @@
+// Copyright 2018 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.
+
+#ifndef CEF_LIBCEF_RENDERER_URL_LOADER_THROTTLE_PROVIDER_IMPL_H_
+#define CEF_LIBCEF_RENDERER_URL_LOADER_THROTTLE_PROVIDER_IMPL_H_
+
+#include <memory>
+#include <vector>
+
+#include "base/threading/thread_checker.h"
+#include "content/public/renderer/url_loader_throttle_provider.h"
+
+// Instances must be constructed on the render thread, and then used and
+// destructed on a single thread, which can be different from the render thread.
+class CefURLLoaderThrottleProviderImpl
+    : public content::URLLoaderThrottleProvider {
+ public:
+  explicit CefURLLoaderThrottleProviderImpl(
+      content::URLLoaderThrottleProviderType type);
+
+  ~CefURLLoaderThrottleProviderImpl() override;
+
+  // content::URLLoaderThrottleProvider implementation.
+  std::unique_ptr<content::URLLoaderThrottleProvider> Clone() override;
+  std::vector<std::unique_ptr<content::URLLoaderThrottle>> CreateThrottles(
+      int render_frame_id,
+      const blink::WebURLRequest& request,
+      content::ResourceType resource_type) override;
+  void SetOnline(bool is_online) override;
+
+ private:
+  // This copy constructor works in conjunction with Clone(), not intended for
+  // general use.
+  CefURLLoaderThrottleProviderImpl(
+      const CefURLLoaderThrottleProviderImpl& other);
+
+  content::URLLoaderThrottleProviderType type_;
+
+  THREAD_CHECKER(thread_checker_);
+
+  DISALLOW_ASSIGN(CefURLLoaderThrottleProviderImpl);
+};
+
+#endif  // CEF_LIBCEF_RENDERER_URL_LOADER_THROTTLE_PROVIDER_IMPL_H_