android: Convert java_deobfuscate.py to Java

build/android/stacktrace/BUILD.gn

Index: build/android/stacktrace/BUILD.gn
diff --git a/build/android/stacktrace/BUILD.gn b/build/android/stacktrace/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..a3957fec3d60b638597b8a0c233ddf7adca18dee
--- /dev/null
+++ b/build/android/stacktrace/BUILD.gn
@@ -0,0 +1,17 @@
+# Copyright 2017 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.
+
+import("//build/config/android/rules.gni")
+
+java_binary("java_deobfuscate") {
+  main_class = "org.chromium.build.FlushingReTrace"
+  java_files = [ "java/org/chromium/build/FlushingReTrace.java" ]
+  deps = [
+    "//third_party/proguard:retrace_java",
+  ]
+  data = [
+    "$root_build_dir/lib.java/build/android/stacktrace/java_deobfuscate.jar",
+    "$root_build_dir/bin/java_deobfuscate",
+  ]
+}