Add the scheme chrome-distiller:// and hook up data source.

chrome/browser/content_settings/host_content_settings_map.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/content_settings/host_content_settings_map.h"
 
 #include <utility>
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
@@ skipping 536 matching lines @@
       case CONTENT_SETTINGS_TYPE_MEDIASTREAM_MIC:
       case CONTENT_SETTINGS_TYPE_MEDIASTREAM_CAMERA:
         return false;
       case CONTENT_SETTINGS_TYPE_COOKIES:
         return secondary_url.SchemeIs(extensions::kExtensionScheme);
       default:
         return true;
     }
   }
   return primary_url.SchemeIs(chrome::kChromeDevToolsScheme) ||
+         primary_url.SchemeIs(chrome::kDomDistillerScheme) ||

[nasko, 2014/01/16 23:39:12]

I'm not sure if we need to exempt the scheme from content settings. If I
understand the feature correctly, we will strip down the DOM to the simplest
form and display that. This is not Chrome internal content, rather untrusted
data from the web, we don't need to exempt this content from content settings.

nit: please keep this in alphabetical order, since most other places where the
schemes appear do it.

[nyquist, 2014/01/22 00:47:58]

Removed.

          primary_url.SchemeIs(chrome::kChromeUIScheme);
 }
 
 base::Value* HostContentSettingsMap::GetWebsiteSetting(
     const GURL& primary_url,
     const GURL& secondary_url,
     ContentSettingsType content_type,
     const std::string& resource_identifier,
     content_settings::SettingInfo* info) const {
   DCHECK(SupportsResourceIdentifier(content_type) ||
@@ skipping 45 matching lines @@
     HostContentSettingsMap::GetProviderTypeFromSource(
         const std::string& source) {
   for (size_t i = 0; i < arraysize(kProviderNames); ++i) {
     if (source == kProviderNames[i])
       return static_cast<ProviderType>(i);
   }
 
   NOTREACHED();
   return DEFAULT_PROVIDER;
 }