🙅 Bind a WebAPK to its "host" browser.

web_apks/minting_example/BUILD.gn

Index: web_apks/minting_example/BUILD.gn
diff --git a/web_apks/minting_example/BUILD.gn b/web_apks/minting_example/BUILD.gn
index d5a7d8f767d5bb216420fadeba2fd4ea7e3fcced..430a3522004690a5233292cc8b5613663279f24a 100644
--- a/web_apks/minting_example/BUILD.gn
+++ b/web_apks/minting_example/BUILD.gn
@@ -8,6 +8,9 @@ declare_args() {
   # The origin URL of minted apks, for example: "foo.com"
   manifest_package_minting_origin = "template"
 
+  # The browser to which WebAPKs will be bound.
+  runtime_host = "com.google.android.apps.chrome"
+
   # The URL for the minted apks, for example: "https://foo.com"
   host_url = "https://www.template.com/home_page"
   scope_url_host = "www.template.com"
@@ -42,6 +45,7 @@ jinja_template("minting_example_manifest") {
     "min_sdk_version=16",
     "target_sdk_version=23",
     "host_url=$host_url",
+    "runtime_host=$runtime_host",
     "scope_url_host=$scope_url_host",
     "mac=$mac",
     "scope=$scope",
@@ -71,7 +75,10 @@ android_library("minting_client_lib") {
 }
 
 android_library("minting_common_lib") {
-  java_files = [ "$minting_common_dir/org/chromium/minting/lib/common/WebAPKConstants.java" ]
+  java_files = [
+    "$minting_common_dir/org/chromium/minting/lib/common/WebAPKConstants.java",
+    "$minting_common_dir/org/chromium/minting/lib/common/WebAPKUtils.java"
+  ]
 }
 
 android_aidl("minting_service_aidl") {
@@ -132,6 +139,7 @@ android_library("web_apk_javatests") {
   java_files = [ "$minting_example_dir/javatests/src/org/chromium/minting/DexLoaderTest.java" ]
   deps = [
     ":dex_loader_lib",
+    ":minting_common_lib",
     "//base:base_java",
     "//content/public/test/android:content_java_test_support",
   ]