Creating new gn arg: enable_all_proguard_optimizations.

mojo/android/BUILD.gn

 # Copyright 2014 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")
 
 group("android") {
   testonly = true
   deps = [
     ":mojo_javatests",
-    ":mojo_test_apk",
     ":system_java",
   ]
+  if (!enable_all_proguard_optimizations) {
+    deps += [ ":mojo_test_apk" ]
+  }
 }
 
 generate_jni("jni_headers") {
   sources = [
     "javatests/src/org/chromium/mojo/MojoTestCase.java",
     "javatests/src/org/chromium/mojo/bindings/ValidationTestUtil.java",
   ]
   public_deps = [
     ":system_java_jni_headers",
   ]
@@ skipping 99 matching lines @@
     "//base/test/:test_support",
     "//build/config/sanitizers:deps",
     "//mojo/edk/system",
     "//mojo/message_pump",
     "//mojo/public/cpp/bindings/tests:mojo_public_bindings_test_utils",
     "//mojo/public/cpp/test_support:test_utils",
   ]
   defines = [ "UNIT_TEST" ]
 }
 
-instrumentation_test_apk("mojo_test_apk") {
-  deps = [
-    ":mojo_javatests",
-    ":system_java",
-    "//base:base_java",
-    "//mojo/public/interfaces/bindings/tests:test_interfaces",
-    "//mojo/public/java:bindings",
-  ]
-  shared_libraries = [ ":mojo_java_unittests" ]
-  apk_name = "MojoTest"
-  android_manifest = "javatests/AndroidManifest.xml"
-  isolate_file = "../mojo_test_apk.isolate"
+if (!enable_all_proguard_optimizations) {
+  instrumentation_test_apk("mojo_test_apk") {
+    deps = [
+      ":mojo_javatests",
+      ":system_java",
+      "//base:base_java",
+      "//mojo/public/interfaces/bindings/tests:test_interfaces",
+      "//mojo/public/java:bindings",
+    ]
+    shared_libraries = [ ":mojo_java_unittests" ]
+    apk_name = "MojoTest"
+    android_manifest = "javatests/AndroidManifest.xml"
+    isolate_file = "../mojo_test_apk.isolate"
+  }
 }