Use a direct include of utf_string_conversions.h in content/.

BUG=none
TEST=none
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Review URL: https://chromiumcodereview.appspot.com/16408017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@204917 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/content/browser/plugin_data_remover_impl.cc b/content/browser/plugin_data_remover_impl.cc
index de320b7..90f161d 100644
--- a/content/browser/plugin_data_remover_impl.cc
+++ b/content/browser/plugin_data_remover_impl.cc
@@ -9,8 +9,8 @@
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
 #include "base/sequenced_task_runner_helpers.h"
+#include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/waitable_event.h"
-#include "base/utf_string_conversions.h"
 #include "base/version.h"
 #include "content/browser/plugin_process_host.h"
 #include "content/browser/plugin_service_impl.h"