Implementation (cc file) for background loader contents.

components/offline_pages/content/background_loader/background_loader_contents.cc

+// Copyright (c) 2016 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 "components/offline_pages/content/background_loader/background_loader_contents.h"
+
+#include "content/public/browser/web_contents.h"
+
+namespace background_loader {
+
+BackgroundLoaderContents::BackgroundLoaderContents(
+    content::BrowserContext* browser_context)
+    : browser_context_(browser_context) {
+  web_contents_.reset(content::WebContents::Create(
+      content::WebContents::CreateParams(browser_context_)));
+  web_contents_->SetDelegate(this);
+}
+
+BackgroundLoaderContents::~BackgroundLoaderContents() {}
+
+void BackgroundLoaderContents::LoadPage(const GURL& url) {
+  web_contents_->GetController().LoadURL(
+      url /* url to be loaded */,
+      content::Referrer() /* Default referrer policy, no referring url */,
+      ui::PAGE_TRANSITION_LINK /* page transition type: clicked on link */,
+      std::string() /* extra headers */);
+}
+
+void BackgroundLoaderContents::Cancel() {
+  web_contents_->Close();
+}
+
+bool BackgroundLoaderContents::IsNeverVisible(
+    content::WebContents* web_contents) {
+  // Background, so not visible.
+  return true;
+}
+
+void BackgroundLoaderContents::CloseContents(content::WebContents* source) {
+  // Do nothing. Other pages should not be able to close a background page.

[dougarnett, 2016/11/14 20:12:16]

NOTREACHED() then?

[chili, 2016/11/15 02:02:22]

Done.

+}
+
+bool BackgroundLoaderContents::ShouldSuppressDialogs(
+    content::WebContents* source) {
+  // Dialog prompts are not actionable in the background.
+  return true;
+}
+
+bool BackgroundLoaderContents::ShouldFocusPageAfterCrash() {
+  // Background page should never be focused.
+  return false;
+}
+
+void BackgroundLoaderContents::CanDownload(
+    const GURL& url,
+    const std::string& request_method,
+    const base::Callback<void(bool)>& callback) {
+  // Do not download anything.
+  callback.Run(false);
+}
+
+bool BackgroundLoaderContents::ShouldCreateWebContents(
+    content::WebContents* contents,
+    int32_t route_id,
+    int32_t main_frame_route_id,
+    int32_t main_frame_widget_route_id,
+    WindowContainerType window_container_type,
+    const std::string& frame_name,
+    const GURL& target_url,
+    const std::string& partition_id,
+    content::SessionStorageNamespace* session_storage_namespace) {
+  // Background pages should not create other webcontents/tabs.
+  return false;
+}
+
+void BackgroundLoaderContents::AddNewContents(
+    content::WebContents* source,
+    content::WebContents* new_contents,
+    WindowOpenDisposition disposition,
+    const gfx::Rect& initial_rect,
+    bool user_gesture,
+    bool* was_blocked) {
+  // Pop-ups should be blocked;
+  // background pages should not create other contents
+  if (was_blocked != nullptr)
+    *was_blocked = true;
+}
+
+#if defined(OS_ANDROID)
+bool BackgroundLoaderContents::ShouldBlockMediaRequest(const GURL& url) {
+  // Background pages should not have access to media.
+  return true;
+}
+#endif
+
+void BackgroundLoaderContents::RequestMediaAccessPermission(
+    content::WebContents* contents,
+    const content::MediaStreamRequest& request,
+    const content::MediaResponseCallback& callback) {
+  // No permissions granted, act as if dismissed.
+  callback.Run(
+      content::MediaStreamDevices(),
+      content::MediaStreamRequestResult::MEDIA_DEVICE_PERMISSION_DISMISSED,
+      std::unique_ptr<content::MediaStreamUI>());
+}
+
+bool BackgroundLoaderContents::CheckMediaAccessPermission(
+    content::WebContents* contents,
+    const GURL& security_origin,
+    content::MediaStreamType type) {
+  return false;  // No permissions granted.
+}
+
+BackgroundLoaderContents::BackgroundLoaderContents()
+    : browser_context_(nullptr) {
+  web_contents_.reset();
+}
+
+}  // namespace background_loader