fix: proper fallback option handling

autosynth cannot find the source of changes triggered by earlier changes in this
        repository, or by version upgrades to tools such as linters.

Author: yoshi-automation

packages/google-cloud-phishingprotection/src/v1beta1/phishing_protection_service_v1_beta1_client.ts

@@ -100,14 +100,11 @@ export class PhishingProtectionServiceV1Beta1Client {
     // const showcaseClient = new showcaseClient({ projectId, customConfig });
     opts.clientConfig = opts.clientConfig || {};
 
-    const isBrowser = typeof window !== 'undefined';
-    if (isBrowser) {
-      opts.fallback = true;
-    }
-    // If we are in browser, we are already using fallback because of the
-    // "browser" field in package.json.
-    // But if we were explicitly requested to use fallback, let's do it now.
-    this._gaxModule = !isBrowser && opts.fallback ? gax.fallback : gax;
+    // If we're running in browser, it's OK to omit `fallback` since
+    // google-gax has `browser` field in its `package.json`.
+    // For Electron (which does not respect `browser` field),
+    // pass `{fallback: true}` to the PhishingProtectionServiceV1Beta1Client constructor.
+    this._gaxModule = opts.fallback ? gax.fallback : gax;
 
     // Create a `gaxGrpc` object, with any grpc-specific options
     // sent to the client.

packages/google-cloud-phishingprotection/synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/nodejs-phishing-protection.git",
-        "sha": "f30f164139c18728e33a997d16c900867831389f"
+        "sha": "8dcefc34ba6b8b7f6e55166c6ba58209a1301375"
       }
     },
     {