Remove more three stub files that were moved to content/browser directory.

BUG=None
TEST=trybots

Review URL: http://codereview.chromium.org/6596006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@76131 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 490d4c7..75596ff 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -22,7 +22,6 @@
 #include "chrome/browser/geolocation/geolocation_content_settings_map.h"
 #include "chrome/browser/geolocation/geolocation_prefs.h"
 #include "chrome/browser/google/google_url_tracker.h"
-#include "chrome/browser/host_zoom_map.h"
 #include "chrome/browser/instant/instant_controller.h"
 #include "chrome/browser/intranet_redirect_detector.h"
 #include "chrome/browser/metrics/metrics_log.h"
@@ -56,6 +55,7 @@
 #include "chrome/browser/webui/new_tab_ui.h"
 #include "chrome/browser/webui/plugins_ui.h"
 #include "chrome/common/pref_names.h"
+#include "content/browser/host_zoom_map.h"
 
 #if defined(TOOLKIT_VIEWS)  // TODO(port): whittle this down as we port
 #include "chrome/browser/ui/views/browser_actions_container.h"