ui: Cleanup class/struct forward declarations

build/android/java_assertion_enabler/BUILD.gn

Index: build/android/java_assertion_enabler/BUILD.gn
diff --git a/build/android/java_assertion_enabler/BUILD.gn b/build/android/java_assertion_enabler/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..e5c896b4101cf3d765614f511a2e78c47a697353
--- /dev/null
+++ b/build/android/java_assertion_enabler/BUILD.gn
@@ -0,0 +1,16 @@
+# Copyright 2016 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_assertion_enabler") {
+  testonly = true
+  java_files =
+      [ "java/org/chromium/javaassertionenabler/AssertionEnabler.java" ]
+  main_class = "org.chromium.javaassertionenabler.AssertionEnabler"
+  deps = [
+    "//third_party/guava:guava_java",
+    "//third_party/ow2_asm:asm_java",
+  ]
+}