Video Tutorials : Allowed autoplay for video player URL

Bug: 1132709
Change-Id: I51b0823e590b158a97061894ed0b8bc9bbb7d143
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2434554
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811975}

chrome/browser/ui/BUILD.gn

@@ -384,6 +384,7 @@ static_library("ui") {
     "//chrome/browser/ui/webui/read_later:mojo_bindings",
     "//chrome/browser/ui/webui/tab_search:mojo_bindings",
     "//chrome/browser/ui/webui/usb_internals:mojo_bindings",
+    "//chrome/browser/video_tutorials",
     "//chrome/common",
     "//chrome/common/net",
     "//chrome/common/search:mojo_bindings",

chrome/browser/ui/tab_helpers.cc

@@ -123,6 +123,7 @@
 #include "chrome/browser/flags/android/chrome_feature_list.h"
 #include "chrome/browser/ui/android/context_menu_helper.h"
 #include "chrome/browser/ui/javascript_dialogs/javascript_tab_modal_dialog_manager_delegate_android.h"
+#include "chrome/browser/video_tutorials/video_tutorial_tab_helper.h"
 #else
 #include "chrome/browser/banners/app_banner_manager_desktop.h"
 #include "chrome/browser/safe_browsing/safe_browsing_tab_observer.h"
@@ -356,6 +357,7 @@ void TabHelpers::AttachTabHelpers(WebContents* web_contents) {
         web_contents);
   }
   SearchGeolocationDisclosureTabHelper::CreateForWebContents(web_contents);
+  video_tutorials::VideoTutorialTabHelper::CreateForWebContents(web_contents);
 #else
   banners::AppBannerManagerDesktop::CreateForWebContents(web_contents);
   BookmarkTabHelper::CreateForWebContents(web_contents);

chrome/browser/video_tutorials/BUILD.gn

@@ -26,9 +26,14 @@ source_set("public") {
     "tutorial.cc",
     "tutorial.h",
     "video_tutorial_service.h",
+    "video_tutorial_tab_helper.cc",
+    "video_tutorial_tab_helper.h",
   ]
 
-  deps = []
+  deps = [
+    "//chrome/common",
+    "//content/public/browser",
+  ]
 
   public_deps = [
     "//base",

chrome/browser/video_tutorials/video_tutorial_tab_helper.cc

+// Copyright 2020 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 "chrome/browser/video_tutorials/video_tutorial_tab_helper.h"
+
+#include "build/build_config.h"
+#include "content/public/browser/navigation_handle.h"
+#include "third_party/blink/public/common/associated_interfaces/associated_interface_provider.h"
+#include "third_party/blink/public/mojom/autoplay/autoplay.mojom.h"
+
+namespace video_tutorials {
+namespace {
+
+// Returns whether the URL of the navigation matches the video player URL.
+bool IsVideoPlayerURL(GURL url) {
+#if defined(OS_ANDROID)
+  std::string url_string = url.possibly_invalid_spec();
+  if (url_string.find(chrome::kChromeUIUntrustedVideoPlayerUrl) == 0)
+    return true;
+#endif
+  return false;
+}
+
+}  // namespace
+
+VideoTutorialTabHelper::VideoTutorialTabHelper(
+    content::WebContents* web_contents)
+    : content::WebContentsObserver(web_contents) {}
+
+VideoTutorialTabHelper::~VideoTutorialTabHelper() = default;
+
+void VideoTutorialTabHelper::ReadyToCommitNavigation(
+    content::NavigationHandle* handle) {
+  std::string url = handle->GetURL().possibly_invalid_spec();
+  if (!IsVideoPlayerURL(handle->GetURL()))
+    return;
+
+  mojo::AssociatedRemote<blink::mojom::AutoplayConfigurationClient> client;
+  handle->GetRenderFrameHost()->GetRemoteAssociatedInterfaces()->GetInterface(
+      &client);
+  client->AddAutoplayFlags(url::Origin::Create(handle->GetURL()),
+                           blink::mojom::kAutoplayFlagUserException);
+}
+
+WEB_CONTENTS_USER_DATA_KEY_IMPL(VideoTutorialTabHelper)
+
+}  // namespace video_tutorials

chrome/browser/video_tutorials/video_tutorial_tab_helper.h

+// Copyright 2020 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 CHROME_BROWSER_VIDEO_TUTORIALS_VIDEO_TUTORIAL_TAB_HELPER_H_
+#define CHROME_BROWSER_VIDEO_TUTORIALS_VIDEO_TUTORIAL_TAB_HELPER_H_
+
+#include "chrome/common/webui_url_constants.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "content/public/browser/web_contents_user_data.h"
+
+namespace video_tutorials {
+
+class VideoTutorialTabHelper
+    : public content::WebContentsObserver,
+      public content::WebContentsUserData<VideoTutorialTabHelper> {
+ public:
+  ~VideoTutorialTabHelper() override;
+  VideoTutorialTabHelper(const VideoTutorialTabHelper&) = delete;
+  VideoTutorialTabHelper& operator=(const VideoTutorialTabHelper&) = delete;
+
+  // content::WebContentsObserver overrides.
+  void ReadyToCommitNavigation(content::NavigationHandle* handle) override;
+
+ private:
+  friend class content::WebContentsUserData<VideoTutorialTabHelper>;
+
+  explicit VideoTutorialTabHelper(content::WebContents* web_contents);
+
+  WEB_CONTENTS_USER_DATA_KEY_DECL();
+};
+
+}  // namespace video_tutorials
+
+#endif  // CHROME_BROWSER_VIDEO_TUTORIALS_VIDEO_TUTORIAL_TAB_HELPER_H_