Add validateOrigin() to the support library.

customtabs/build.gradle

Index: customtabs/build.gradle
diff --git a/customtabs/build.gradle b/customtabs/build.gradle
index b75c34606635bee14ef39ce1c895caf6ea7aea34..a4c6f473d4fd6a6dc69d8a3a354dbff82b368627 100644
--- a/customtabs/build.gradle
+++ b/customtabs/build.gradle
@@ -1,13 +1,21 @@
 apply plugin: 'android-library'
 
 dependencies {
-    compile 'com.android.support:support-annotations:22.2.0+'
-    compile 'com.android.support:support-v4:25.0.1'
+    compile 'com.android.support:support-annotations:24.2.0+'
+    compile 'com.android.support:support-v4:25.3.1'
+
+    androidTestCompile 'junit:junit:4.12'
+    androidTestCompile 'com.android.support.test:runner:0.5'
+    androidTestCompile 'com.android.support.test:rules:0.5'
 }
 
 android {
     compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    buildToolsVersion '25.0.0'
+
+    defaultConfig {
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
 
     sourceSets {
         main.manifest.srcFile 'AndroidManifest.xml'