Remove unnecessary header includes from mozcjni.cc (part 2)

This is a follow up CL for r528 (Mozc 2.16.2045.102). Turned out that there remains one unnecessary header include.

This is just a code refactoring, no behavior change is intended.

BUG=none
TEST=none

git-svn-id: https://mozc.googlecode.com/svn/trunk@536 a6090854-d499-a067-5803-1114d4e51264
diff --git a/src/android/jni/mozcjni.cc b/src/android/jni/mozcjni.cc
index 079c665..293cfea 100644
--- a/src/android/jni/mozcjni.cc
+++ b/src/android/jni/mozcjni.cc
@@ -33,7 +33,6 @@
 
 #include "base/android_jni_proxy.h"
 #include "base/android_util.h"
-#include "base/mutex.h"
 #include "base/scheduler.h"
 #include "base/scoped_ptr.h"
 #include "base/singleton.h"
diff --git a/src/mozc_version_template.txt b/src/mozc_version_template.txt
index 416b09c..84372db 100644
--- a/src/mozc_version_template.txt
+++ b/src/mozc_version_template.txt
@@ -1,6 +1,6 @@
 MAJOR=2
 MINOR=16
-BUILD=2052
+BUILD=2053
 REVISION=102
 # NACL_DICTIONARY_VERSION is the target version of the system dictionary to be
 # downloaded by NaCl Mozc.