Removed --disable-print-preview switch and policy.

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 <set>
 #include <utility>
 #include <vector>
 
@@ skipping 1259 matching lines @@
       }
 
       // Disable client-side phishing detection in the renderer if it is
       // disabled in the Profile preferences or the browser process.
       if (!prefs->GetBoolean(prefs::kSafeBrowsingEnabled) ||
           !g_browser_process->safe_browsing_detection_service()) {
         command_line->AppendSwitch(
             switches::kDisableClientSidePhishingDetection);
       }
 
-      if (!prefs->GetBoolean(prefs::kPrintPreviewDisabled))
-        command_line->AppendSwitch(switches::kRendererPrintPreview);
+      command_line->AppendSwitch(switches::kRendererPrintPreview);

[Lei Zhang, 2014/08/20 00:01:15]

You should get rid of switches::kRendererPrintPreview as well, and assume it's
always there on the renderer side.

[Vitaly Buka (NO REVIEWS), 2014/08/20 01:16:14]

Done.

 
       InstantService* instant_service =
           InstantServiceFactory::GetForProfile(profile);
       if (instant_service &&
           instant_service->IsInstantProcess(process->GetID()))
         command_line->AppendSwitch(switches::kInstantProcess);
 
 #if !defined(OS_CHROMEOS)
       SigninClient* signin_client =
           ChromeSigninClientFactory::GetForProfile(profile);
@@ skipping 1322 matching lines @@
       switches::kDisableWebRtcEncryption,
     };
     to_command_line->CopySwitchesFrom(from_command_line,
                                       kWebRtcDevSwitchNames,
                                       arraysize(kWebRtcDevSwitchNames));
   }
 }
 #endif  // defined(ENABLE_WEBRTC)
 
 }  // namespace chrome