Add validateOrigin() to the support library.

Application/build.gradle

 apply plugin: 'com.android.application'
 
 android {
     compileSdkVersion 23
-    buildToolsVersion "23.0.1"
+    buildToolsVersion '25.0.0'
     defaultConfig {
         applicationId "org.chromium.customtabsclient.example"
         minSdkVersion 16
         targetSdkVersion 23
         versionCode 1
         versionName "1.0"
     }
     buildTypes {
         release {
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
     productFlavors {
     }
 }
 
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
     compile project(':customtabs')
     compile project(':shared')
 }