Revert 86802 - Remove ProtocolFactory/Interceptor uses in GViewRequestInterceptor.

chrome/browser/ui/browser_init.cc

 // Copyright (c) 2011 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/ui/browser_init.h"
 
 #include <algorithm>   // For max().
 
 #include "base/compiler_specific.h"
 #include "base/environment.h"
@@ skipping 537 matching lines @@
   // preferences to work in the guest mode, the initialization has to be
   // done after |profile| is switched to the incognito profile (which
   // is actually GuestSessionProfile in the guest mode). See the
   // GetOffTheRecordProfile() call above.
   profile->InitChromeOSPreferences();
 
   // Create the WmMessageListener so that it can listen for messages regardless
   // of what window has focus.
   chromeos::WmMessageListener::GetInstance();
 
+  // Install the GView request interceptor that will redirect requests
+  // of compatible documents (PDF, etc) to the GView document viewer.
+  const CommandLine& parsed_command_line = *CommandLine::ForCurrentProcess();
+  if (parsed_command_line.HasSwitch(switches::kEnableGView)) {
+    chromeos::GViewRequestInterceptor::GetInstance();
+  }
   if (process_startup) {
     // This observer is a singleton. It is never deleted but the pointer is kept
     // in a static so that it isn't reported as a leak.
     static chromeos::LowBatteryObserver* low_battery_observer =
         new chromeos::LowBatteryObserver(profile);
     chromeos::CrosLibrary::Get()->GetPowerLibrary()->AddObserver(
         low_battery_observer);
 
     static chromeos::UpdateObserver* update_observer =
         new chromeos::UpdateObserver(profile);
@@ skipping 851 matching lines @@
     return false;
   automation->SetExpectedTabCount(expected_tabs);
 
   AutomationProviderList* list =
       g_browser_process->InitAutomationProviderList();
   DCHECK(list);
   list->AddProvider(automation);
 
   return true;
 }