Add chrome-search: access from Instant overlay

content/public/browser/url_data_source.h

 // Copyright (c) 2013 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.
 
-#ifndef CONTENT_PUBLIC_BROWSER_URL_DATA_SOURCE_DELEGATE_H_
-#define CONTENT_PUBLIC_BROWSER_URL_DATA_SOURCE_DELEGATE_H_
+#ifndef CONTENT_PUBLIC_BROWSER_URL_DATA_SOURCE_H_
+#define CONTENT_PUBLIC_BROWSER_URL_DATA_SOURCE_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "content/common/content_export.h"
 
 class MessageLoop;
 
 namespace base {
 class RefCountedMemory;
 }
 
+namespace net {
+class URLRequest;
+}
+
 namespace content {
 class BrowserContext;
 
 // A URLDataSource is an object that can answer requests for data
 // asynchronously. An implementation of URLDataSource should handle calls to
 // StartDataRequest() by starting its (implementation-specific) asynchronous
 // request for the data, then running the callback given in that method to
 // notify.
 class CONTENT_EXPORT URLDataSource {
  public:
@@ skipping 59 matching lines @@
   // thereby slightly reducing the protection applied to the page.
 
   // By default, "object-src 'none';" is added to CSP. Override to change this.
   virtual std::string GetContentSecurityPolicyObjectSrc() const;
   // By default, "frame-src 'none';" is added to CSP. Override to change this.
   virtual std::string GetContentSecurityPolicyFrameSrc() const;
 
   // By default, the "X-Frame-Options: DENY" header is sent. To stop this from
   // happening, return false. It is OK to return false as needed.
   virtual bool ShouldDenyXFrameOptions() const;
+
+  // By default, only chrome: and chrome-devtools: requests are allowed.
+  // Override in specific data sources to enable for additional schemes or to
+  // implement fancier access control.
+  virtual bool ShouldServiceRequest(const net::URLRequest* request) const;
 };
 
 }  // namespace content
 
-#endif  // CONTENT_PUBLIC_BROWSER_URL_DATA_SOURCE_DELEGATE_H_
+#endif  // CONTENT_PUBLIC_BROWSER_URL_DATA_SOURCE_H_