Fix a Truested Type violation on chrome://internals/web-app

This fixes a TT violation on chrome://internals/web-app by disabling
Trusted Types. This is necessary because the page uses Polymer 3
which is yet to support Trusted Types. This change also added few
tests that were missing.

Bug: 41905
Change-Id: I800ea96c2d487988da4a85f8df69a5a2691722ed
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2376989Reviewed-by: Giovanni Ortuño Urquidi <ortuno@chromium.org>
Reviewed-by: Tommy Li <tommycli@chromium.org>
Commit-Queue: Jun Kokatsu <Jun.Kokatsu@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#802010}

chrome/browser/ui/webui/chrome_url_data_manager_browsertest.cc

@@ -208,6 +208,7 @@ static constexpr const char* const kChromeUrls[] = {
     "chrome://identity-internals",
     "chrome://indexeddb-internals",
     "chrome://inspect",
+    "chrome://internals/web-app",
     "chrome://interstitials/ssl",
     "chrome://interventions-internals",
     "chrome://invalidations",
@@ -271,6 +272,8 @@ static constexpr const char* const kChromeUrls[] = {
     "chrome://welcome",
 #if defined(OS_ANDROID)
     "chrome://explore-sites-internals",
+    "chrome://internals/notifications",
+    "chrome://internals/query-tiles",
     "chrome://offline-internals",
     "chrome://webapks",
 #endif

chrome/browser/ui/webui/internals/web_app/web_app_internals_page_handler_impl.cc

@@ -23,6 +23,7 @@ WebAppInternalsPageHandlerImpl::~WebAppInternalsPageHandlerImpl() = default;
 
 void WebAppInternalsPageHandlerImpl::AddPageResources(
     content::WebUIDataSource* source) {
+  source->DisableTrustedTypesCSP();
   source->AddResourcePath("web_app_internals.mojom-lite.js",
                           IDR_WEB_APP_INTERNALS_MOJOM_LITE_JS);
   source->AddResourcePath("web_app_internals.js", IDR_WEB_APP_INTERNALS_JS);