Rename phishing warning page environment variable

The phishing warning page URL environment variable has been renamed
from `PHISHING_PAGE_URL` to `PHISHING_WARNING_PAGE_URL`. We call this
page the "phishing warning page" everywhere else, and this name seemed
better suited (it's not a phishing page itself).

The variable has been listed and documented in `.metamaskrc.dist` as
well.

.metamaskrc.dist

@@ -6,3 +6,6 @@ ONBOARDING_V2=
 SWAPS_USE_DEV_APIS=
 COLLECTIBLES_V1=
 TOKEN_DETECTION_V2=
+
+; Set this to test changes to the phishing warning page.
+PHISHING_WARNING_PAGE_URL=

app/scripts/background.js

@@ -67,7 +67,7 @@ if (inTest || process.env.METAMASK_DEBUG) {
   global.metamaskGetState = localStore.get.bind(localStore);
 }
 
-const phishingPageUrl = new URL(process.env.PHISHING_PAGE_URL);
+const phishingPageUrl = new URL(process.env.PHISHING_WARNING_PAGE_URL);
 
 const ONE_SECOND_IN_MILLISECONDS = 1_000;
 // Timeout for initializing phishing warning page.
@@ -161,7 +161,7 @@ async function loadPhishingWarningPage() {
   let iframe;
   try {
     const extensionStartupPhishingPageUrl = new URL(
-      process.env.PHISHING_PAGE_URL,
+      process.env.PHISHING_WARNING_PAGE_URL,
     );
     // The `extensionStartup` hash signals to the phishing warning page that it should not bother
     // setting up streams for user interaction. Otherwise this page load would cause a console

app/scripts/contentscript.js

@@ -32,7 +32,7 @@ const LEGACY_INPAGE = 'inpage';
 const LEGACY_PROVIDER = 'provider';
 const LEGACY_PUBLIC_CONFIG = 'publicConfig';
 
-const phishingPageUrl = new URL(process.env.PHISHING_PAGE_URL);
+const phishingPageUrl = new URL(process.env.PHISHING_WARNING_PAGE_URL);
 
 if (
   window.location.origin === phishingPageUrl.origin &&
@@ -354,7 +354,7 @@ function blockedDomainCheck() {
  */
 function redirectToPhishingWarning() {
   console.debug('MetaMask: Routing to Phishing Warning page.');
-  const baseUrl = process.env.PHISHING_PAGE_URL;
+  const baseUrl = process.env.PHISHING_WARNING_PAGE_URL;
   window.location.href = `${baseUrl}#${querystring.stringify({
     hostname: window.location.hostname,
     href: window.location.href,

development/build/scripts.js

@@ -34,7 +34,7 @@ const metamaskrc = require('rc')('metamask', {
   INFURA_PROD_PROJECT_ID: process.env.INFURA_PROD_PROJECT_ID,
   ONBOARDING_V2: process.env.ONBOARDING_V2,
   COLLECTIBLES_V1: process.env.COLLECTIBLES_V1,
-  PHISHING_PAGE_URL: process.env.PHISHING_PAGE_URL,
+  PHISHING_WARNING_PAGE_URL: process.env.PHISHING_WARNING_PAGE_URL,
   TOKEN_DETECTION_V2: process.env.TOKEN_DETECTION_V2,
   SEGMENT_HOST: process.env.SEGMENT_HOST,
   SEGMENT_WRITE_KEY: process.env.SEGMENT_WRITE_KEY,
@@ -142,7 +142,7 @@ function getSegmentWriteKey({ buildType, environment }) {
  * @returns {string} The URL for the phishing warning page, or `undefined` if no URL is set.
  */
 function getPhishingWarningPageUrl({ testing }) {
-  let phishingWarningPageUrl = metamaskrc.PHISHING_PAGE_URL;
+  let phishingWarningPageUrl = metamaskrc.PHISHING_WARNING_PAGE_URL;
 
   if (!phishingWarningPageUrl) {
     phishingWarningPageUrl = testing
@@ -838,7 +838,7 @@ function getEnvironmentVariables({ buildType, devMode, testing, version }) {
     METAMASK_BUILD_TYPE: buildType,
     NODE_ENV: devMode ? ENVIRONMENT.DEVELOPMENT : ENVIRONMENT.PRODUCTION,
     IN_TEST: testing,
-    PHISHING_PAGE_URL: getPhishingWarningPageUrl({ testing }),
+    PHISHING_WARNING_PAGE_URL: getPhishingWarningPageUrl({ testing }),
     PUBNUB_SUB_KEY: process.env.PUBNUB_SUB_KEY || '',
     PUBNUB_PUB_KEY: process.env.PUBNUB_PUB_KEY || '',
     CONF: devMode ? metamaskrc : {},