Reland of Add a NavigationThrottle to the public content/ interface

chrome/browser/chrome_content_browser_client.cc

 // Copyright (c) 2012 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/chrome_content_browser_client.h"
 
 #include <map>
 #include <set>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/files/scoped_file.h"
 #include "base/lazy_instance.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/after_startup_task_utils.h"
+#include "chrome/browser/apps/app_url_redirector.h"
 #include "chrome/browser/browser_about_handler.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_shutdown.h"
 #include "chrome/browser/browsing_data/browsing_data_helper.h"
 #include "chrome/browser/browsing_data/browsing_data_remover.h"
 #include "chrome/browser/character_encoding.h"
 #include "chrome/browser/chrome_content_browser_client_parts.h"
 #include "chrome/browser/chrome_net_benchmarking_message_filter.h"
 #include "chrome/browser/chrome_quota_permission_context.h"
 #include "chrome/browser/content_settings/cookie_settings_factory.h"
@@ skipping 77 matching lines @@
 #include "components/variations/variations_associated_data.h"
 #include "components/version_info/version_info.h"
 #include "content/public/browser/browser_child_process_host.h"
 #include "content/public/browser/browser_main_parts.h"
 #include "content/public/browser/browser_ppapi_host.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/browser_url_handler.h"
 #include "content/public/browser/child_process_data.h"
 #include "content/public/browser/child_process_security_policy.h"
 #include "content/public/browser/client_certificate_delegate.h"
+#include "content/public/browser/navigation_handle.h"
+#include "content/public/browser/navigation_throttle.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/resource_context.h"
 #include "content/public/browser/site_instance.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/child_process_host.h"
 #include "content/public/common/content_descriptors.h"
 #include "content/public/common/sandbox_type.h"
 #include "content/public/common/service_registry.h"
@@ skipping 33 matching lines @@
 #include "chromeos/chromeos_switches.h"
 #include "components/user_manager/user_manager.h"
 #elif defined(OS_LINUX)
 #include "chrome/browser/chrome_browser_main_linux.h"
 #elif defined(OS_ANDROID)
 #include "chrome/browser/android/new_tab_page_url_handler.h"
 #include "chrome/browser/android/webapps/single_tab_mode_tab_helper.h"
 #include "chrome/browser/chrome_browser_main_android.h"
 #include "chrome/common/descriptors_android.h"
 #include "components/crash/content/browser/crash_dump_manager_android.h"
+#include "components/navigation_interception/intercept_navigation_delegate.h"
 #include "components/service_tab_launcher/browser/android/service_tab_launcher.h"
 #include "ui/base/resource/resource_bundle_android.h"
 #elif defined(OS_POSIX)
 #include "chrome/browser/chrome_browser_main_posix.h"
 #endif
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 #include "base/debug/leak_annotations.h"
 #include "components/crash/content/app/breakpad_linux.h"
 #include "components/crash/content/browser/crash_handler_host_linux.h"
@@ skipping 2410 matching lines @@
 }
 
 void ChromeContentBrowserClient::RecordURLMetric(const std::string& metric,
                                                  const GURL& url) {
   if (url.is_valid()) {
     rappor::SampleDomainAndRegistryFromGURL(g_browser_process->rappor_service(),
                                             metric, url);
   }
 }
 
+ScopedVector<content::NavigationThrottle>
+ChromeContentBrowserClient::CreateThrottlesForNavigation(
+    content::NavigationHandle* handle) {
+  ScopedVector<content::NavigationThrottle> throttles;
+#if defined(OS_ANDROID)
+  // TODO(davidben): This is insufficient to integrate with prerender properly.
+  // https://crbug.com/370595
+  prerender::PrerenderContents* prerender_contents =
+      prerender::PrerenderContents::FromWebContents(handle->GetWebContents());
+  if (!prerender_contents && handle->IsInMainFrame()) {
+    throttles.push_back(
+        navigation_interception::InterceptNavigationDelegate::CreateThrottleFor(
+            handle)
+            .Pass());
+  }
+#else
+  if (handle->IsInMainFrame()) {
+    // Redirect some navigations to apps that have registered matching URL
+    // handlers ('url_handlers' in the manifest).
+    scoped_ptr<content::NavigationThrottle> url_to_app_throttle =
+        AppUrlRedirector::MaybeCreateThrottleFor(handle);
+    if (url_to_app_throttle)
+      throttles.push_back(url_to_app_throttle.Pass());
+  }
+#endif
+  return throttles.Pass();
+}
+
 content::DevToolsManagerDelegate*
 ChromeContentBrowserClient::GetDevToolsManagerDelegate() {
   return new ChromeDevToolsManagerDelegate();
 }
 
 content::TracingDelegate* ChromeContentBrowserClient::GetTracingDelegate() {
 #if !defined(OS_ANDROID)
   return new ChromeTracingDelegate();
 #else
   return nullptr;
@@ skipping 58 matching lines @@
   if (channel <= kMaxDisableEncryptionChannel) {
     static const char* const kWebRtcDevSwitchNames[] = {
       switches::kDisableWebRtcEncryption,
     };
     to_command_line->CopySwitchesFrom(from_command_line,
                                       kWebRtcDevSwitchNames,
                                       arraysize(kWebRtcDevSwitchNames));
   }
 }
 #endif  // defined(ENABLE_WEBRTC)