Terminal CSP requires style and font to load web fonts

Bug: 1085324
Change-Id: I69984c8fa234da941382779544bbcd90a45f4ccc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2224891
Commit-Queue: Jason Lin <lxj@google.com>
Reviewed-by: Jason Lin <lxj@google.com>
Auto-Submit: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#773929}

chrome/browser/chromeos/web_applications/terminal_source.cc

@@ -156,5 +156,5 @@ std::string TerminalSource::GetContentSecurityPolicyImgSrc() {
 }
 
 std::string TerminalSource::GetContentSecurityPolicyStyleSrc() {
-  return "style-src 'self' 'unsafe-inline';";
+  return "style-src * 'unsafe-inline'; font-src *;";
 }