Fix compile on linux_redux bots

chrome/browser/safe_browsing/safe_browsing_tab_observer.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/safe_browsing/safe_browsing_tab_observer.h"
 
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/safe_browsing/client_side_detection_host.h"
 #include "chrome/browser/ui/tab_contents/tab_contents_wrapper.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/render_messages.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "content/public/browser/notification_details.h"
 #include "content/public/browser/notification_source.h"
 
+#if defined(ENABLE_SAFE_BROWSING)
+#include "chrome/browser/safe_browsing/client_side_detection_host.h"
+#endif
+
 namespace safe_browsing {
 
+#if !defined(ENABLE_SAFE_BROWSING)
+// Provide a dummy implementation so that scoped_ptr<ClientSideDetectionHost>
+// has a concrete destructor to call. This is necessary because it is used
+// as a member of SafeBrowsingTabObserver, even if it only ever contains NULL.
+class ClientSideDetectionHost { };
+#endif
+
 SafeBrowsingTabObserver::SafeBrowsingTabObserver(
     TabContentsWrapper* wrapper) : wrapper_(wrapper) {
 #if defined(ENABLE_SAFE_BROWSING)
   PrefService* prefs = wrapper_->profile()->GetPrefs();
   if (prefs) {
     pref_change_registrar_.Init(prefs);
     pref_change_registrar_.Add(prefs::kSafeBrowsingEnabled, this);
 
     if (prefs->GetBoolean(prefs::kSafeBrowsingEnabled) &&
         g_browser_process->safe_browsing_detection_service()) {
@@ skipping 48 matching lines @@
     safebrowsing_detection_host_.reset();
   }
 
   RenderViewHost* rvh = wrapper_->tab_contents()->render_view_host();
   rvh->Send(new ChromeViewMsg_SetClientSidePhishingDetection(rvh->routing_id(),
                                                              safe_browsing));
 #endif
 }
 
 }  // namespace safe_browsing