Remove the mojo_use_application_in_sdk GN variable.

mojo/public/java/BUILD.gn

Index: mojo/public/java/BUILD.gn
diff --git a/mojo/public/java/BUILD.gn b/mojo/public/java/BUILD.gn
index 6c9c3080ebdf50d661bc0369065ea19956545fe3..81c3ba12f49debf4d426e7844e2077ea0588659f 100644
--- a/mojo/public/java/BUILD.gn
+++ b/mojo/public/java/BUILD.gn
@@ -3,7 +3,6 @@
 # found in the LICENSE file.
 
 import("//build/config/android/rules.gni")
-import("../mojo.gni")
 
 android_library("system") {
   java_files = [
@@ -24,6 +23,22 @@ android_library("system") {
   ]
 }
 
+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",
@@ -60,21 +75,3 @@ android_library("bindings") {
 
   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",
-    ]
-  }
-}