Delete isWebApkInstalled in ShortcutHelper.java to minimize JNI usage.

chrome/browser/android/shortcut_helper.cc

Index: chrome/browser/android/shortcut_helper.cc
diff --git a/chrome/browser/android/shortcut_helper.cc b/chrome/browser/android/shortcut_helper.cc
index e5c087287bc505fc2071687ff8033745eb4f4ad4..dd68f9c0c32c34dd09aa4c23993eaf9a5b466681 100644
--- a/chrome/browser/android/shortcut_helper.cc
+++ b/chrome/browser/android/shortcut_helper.cc
@@ -261,10 +261,7 @@ std::string ShortcutHelper::QueryWebApkPackage(const GURL& url) {
 
 // static
 bool ShortcutHelper::IsWebApkInstalled(const GURL& url) {
-  JNIEnv* env = base::android::AttachCurrentThread();
-  ScopedJavaLocalRef<jstring> java_url =
-      base::android::ConvertUTF8ToJavaString(env, url.spec());
-  return Java_ShortcutHelper_isWebApkInstalled(env, java_url);
+  return !QueryWebApkPackage(url).empty();
 }
 
 GURL ShortcutHelper::GetScopeFromURL(const GURL& url) {