Handle online and offline redirects via interceptor and offline scheme

chrome/browser/profiles/profile_io_data.cc

Index: chrome/browser/profiles/profile_io_data.cc
diff --git a/chrome/browser/profiles/profile_io_data.cc b/chrome/browser/profiles/profile_io_data.cc
index 1ac33c4f4d5fec393a781e23d957bf0346542e59..34679fa91786d0a6d4779e9cd253d31686451d9c 100644
--- a/chrome/browser/profiles/profile_io_data.cc
+++ b/chrome/browser/profiles/profile_io_data.cc
@@ -126,6 +126,8 @@
 #endif
 
 #if defined(OS_ANDROID)
+#include "chrome/browser/android/offline_pages/offline_page_protocol_handler.h"
+#include "chrome/browser/android/offline_pages/offline_page_request_handler.h"
 #include "content/public/browser/android/content_protocol_handler.h"
 #endif  // defined(OS_ANDROID)
 
@@ -1161,6 +1163,15 @@ void ProfileIOData::Init(
         profile_params_->new_tab_page_interceptor.release());
   }
 
+  // Install the Offline Page Interceptor.
+#if defined(OS_ANDROID)
+  std::unique_ptr<net::URLRequestInterceptor> offline_page_interceptor =
+      offline_pages::OfflinePageRequestHandler::CreateInterceptor(
+          profile_params_->profile);
+  if (offline_page_interceptor.get())
+    request_interceptors.push_back(offline_page_interceptor.release());
+#endif
+
   std::unique_ptr<net::MultiLogCTVerifier> ct_verifier(
       new net::MultiLogCTVerifier());
   ct_verifier->AddLogs(io_thread_globals->ct_logs);
@@ -1241,6 +1252,10 @@ ProfileIOData::SetUpJobFactoryDefaults(
           content::BrowserThread::GetBlockingPool()
               ->GetTaskRunnerWithShutdownBehavior(
                   base::SequencedWorkerPool::SKIP_ON_SHUTDOWN)));
+  set_protocol = job_factory->SetProtocolHandler(
+      chrome::kOfflinePageScheme,
+      base::WrapUnique(new offline_pages::OfflinePageProtocolHandler(
+          profile_params_->profile)));
 #endif
 
   job_factory->SetProtocolHandler(