Add a chrome://webapks page.

chrome/browser/android/chrome_jni_registrar.cc

Index: chrome/browser/android/chrome_jni_registrar.cc
diff --git a/chrome/browser/android/chrome_jni_registrar.cc b/chrome/browser/android/chrome_jni_registrar.cc
index 8a1844292aff1910e02132c0abe286cc0df0d494..e4e72efe174894c714db7692fddc7dee47da514a 100644
--- a/chrome/browser/android/chrome_jni_registrar.cc
+++ b/chrome/browser/android/chrome_jni_registrar.cc
@@ -162,6 +162,7 @@
 #include "chrome/browser/ui/android/tab_model/tab_model_selector_base.h"
 #include "chrome/browser/ui/android/toolbar/toolbar_model_android.h"
 #include "chrome/browser/ui/android/usb_chooser_dialog_android.h"
+#include "chrome/browser/ui/webui/webapk_info_callback.h"
 #include "components/dom_distiller/content/browser/android/content_jni_registrar.h"
 #include "components/dom_distiller/core/android/core_jni_registrar.h"
 #include "components/gcm_driver/android/component_jni_registrar.h"
@@ -414,6 +415,7 @@ static base::android::RegistrationMethod kChromeRegisteredMethods[] = {
     {"NativeCallbacks", NativeCallbacks::RegisterNativeCallbacksNatives},
 #endif
     {"WarmupManager", RegisterWarmupManager},
+    {"WebapkInfoCallback", WebapkInfoCallback::Register},
     {"WebApkInstaller", WebApkInstaller::Register},
     {"WebApkUpdateManager", WebApkUpdateManager::Register},
     {"WebApkUpdateDataFetcher", WebApkUpdateDataFetcher::Register},