Remove the mojo_use_application_in_sdk GN variable.

mojo/public/java/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")
-import("../mojo.gni")
 
 android_library("system") {
   java_files = [
     "system/src/org/chromium/mojo/system/AsyncWaiter.java",
     "system/src/org/chromium/mojo/system/Core.java",
     "system/src/org/chromium/mojo/system/DataPipe.java",
     "system/src/org/chromium/mojo/system/Flags.java",
     "system/src/org/chromium/mojo/system/Handle.java",
     "system/src/org/chromium/mojo/system/InvalidHandle.java",
     "system/src/org/chromium/mojo/system/MessagePipeHandle.java",
     "system/src/org/chromium/mojo/system/MojoException.java",
     "system/src/org/chromium/mojo/system/MojoResult.java",
     "system/src/org/chromium/mojo/system/Pair.java",
     "system/src/org/chromium/mojo/system/ResultAnd.java",
     "system/src/org/chromium/mojo/system/SharedBufferHandle.java",
     "system/src/org/chromium/mojo/system/UntypedHandle.java",
     "system/src/org/chromium/mojo/system/RunLoop.java",
   ]
 }
 
+android_library("application") {
+  java_files = [
+    "application/src/org/chromium/mojo/application/ApplicationConnection.java",
+    "application/src/org/chromium/mojo/application/ApplicationDelegate.java",
+    "application/src/org/chromium/mojo/application/ApplicationImpl.java",
+    "application/src/org/chromium/mojo/application/ApplicationRunner.java",
+    "application/src/org/chromium/mojo/application/ServiceFactoryBinder.java",
+    "application/src/org/chromium/mojo/application/ShellHelper.java",
+  ]
+  deps = [
+    ":bindings",
+    ":system",
+    "../interfaces/application:application_java",
+  ]
+}
+
 android_library("bindings") {
   java_files = [
     "bindings/src/org/chromium/mojo/bindings/AutoCloseableRouter.java",
     "bindings/src/org/chromium/mojo/bindings/BindingsHelper.java",
     "bindings/src/org/chromium/mojo/bindings/Callbacks.java",
     "bindings/src/org/chromium/mojo/bindings/ConnectionErrorHandler.java",
     "bindings/src/org/chromium/mojo/bindings/Connector.java",
     "bindings/src/org/chromium/mojo/bindings/DataHeader.java",
     "bindings/src/org/chromium/mojo/bindings/Decoder.java",
     "bindings/src/org/chromium/mojo/bindings/DelegatingConnectionErrorHandler.java",
@@ skipping 16 matching lines @@
     "bindings/src/org/chromium/mojo/bindings/Struct.java",
     "bindings/src/org/chromium/mojo/bindings/Union.java",
   ]
 
   deps = [
     ":system",
   ]
 
   srcjar_deps = [ "../interfaces/bindings:bindings_java_sources" ]
 }
-
-if (mojo_use_application_in_sdk) {
-  android_library("application") {
-    java_files = [
-      "application/src/org/chromium/mojo/application/ApplicationConnection.java",
-      "application/src/org/chromium/mojo/application/ApplicationDelegate.java",
-      "application/src/org/chromium/mojo/application/ApplicationImpl.java",
-      "application/src/org/chromium/mojo/application/ApplicationRunner.java",
-      "application/src/org/chromium/mojo/application/ServiceFactoryBinder.java",
-      "application/src/org/chromium/mojo/application/ShellHelper.java",
-    ]
-    deps = [
-      ":bindings",
-      ":system",
-      "../interfaces/application:application_java",
-    ]
-  }
-}