Web Share: restrict URL scheme to http and https

We now follow the recent spec change limiting the permitted scheme
for shared urls to http and https - see
w3c/web-share#173
w3c/web-share#174
w3c/web-share#177

We make an exception if the page performing the share it itself loaded
from a different scheme (e.g. file) - in that case we allow the same
scheme to be used for the shared url.

Bug: 1131755
Change-Id: I6abf0f9acd40ef79ec49379314e2ef3a81d3467e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2425977
Commit-Queue: Eric Willigers <ericwilligers@chromium.org>
Reviewed-by: Glen Robertson <glenrob@chromium.org>
Auto-Submit: Eric Willigers <ericwilligers@chromium.org>
Cr-Commit-Position: refs/heads/master@{#810180}

web-share/canShare.tentative.https.html

@@ -11,74 +11,74 @@
  'use strict';
 
  test(() => {
- assert_equals(navigator.canShare(), false);
+ assert_false(navigator.canShare());
  }, 'canShare with no arguments (same as empty dictionary)');
 
  test(() => {
- assert_equals(navigator.canShare({}), false);
+ assert_false(navigator.canShare({}));
  }, 'canShare with an empty dictionary');
 
  test(() => {
- assert_equals(navigator.canShare(undefined), false);
+ assert_false(navigator.canShare(undefined));
  }, 'canShare with a undefined argument (same as empty dictionary)');
 
  test(() => {
- assert_equals(navigator.canShare(null), false);
+ assert_false(navigator.canShare(null));
  }, 'canShare with a null argument (same as empty dictionary)');
 
  test(() => {
- assert_equals(navigator.canShare({unused: 'unexpected field'}), false);
+ assert_false(navigator.canShare({unused: 'unexpected field'}));
  }, 'canShare with a dictionary containing only surplus fields');
 
  test(() => {
  // URL is invalid in that the URL Parser returns failure (port is too
  // large).
  const url = 'http://example.com:65536';
- assert_equals(navigator.canShare({url}), false);
+ assert_false(navigator.canShare({url}));
  }, 'canShare with an invalid URL');
 
  test(() => {
- assert_equals(navigator.canShare({title: undefined}), false);
+ assert_false(navigator.canShare({url: 'data:the url'}));
+ }, 'canShare with data URL');
+
+ test(() => {
+ assert_false(navigator.canShare({title: undefined}));
  }, 'canShare with attribute undefined is equivalent to omitting the attribute');
 
  test(() => {
- assert_equals(navigator.canShare({title: 'subject'}), true);
+ assert_true(navigator.canShare({title: 'subject'}));
  }, 'canShare with title');
 
  test(() => {
- assert_equals(navigator.canShare({text: 'body'}), true);
+ assert_true(navigator.canShare({text: 'body'}));
  }, 'canShare with text');
 
  test(() => {
- assert_equals(navigator.canShare({url: 'https://www.example.com/some/path?some_query#some_fragment'}), true);
+ assert_true(navigator.canShare({url: 'https://www.example.com/some/path?some_query#some_fragment'}));
  }, 'canShare with URL');
 
  test(() => {
- assert_equals(navigator.canShare({title: null}), true);
+ assert_true(navigator.canShare({title: null}));
  }, 'canShare with null attribute');
 
  test(() => {
- assert_equals(navigator.canShare({text: 123}), true);
+ assert_true(navigator.canShare({text: 123}));
  }, 'canShare with number');
 
  test(() => {
- assert_equals(navigator.canShare({url: {toString() { return 'https://example.com/'; }}}), true);
+ assert_true(navigator.canShare({url: {toString() { return 'https://example.com/'; }}}));
  }, 'canShare with object');
 
  test(() => {
- assert_equals(navigator.canShare({title: 'subject', text: 'body', url: 'https://example.com/', unused: 'unexpected field'}), true);
+ assert_true(navigator.canShare({title: 'subject', text: 'body', url: 'https://example.com/', unused: 'unexpected field'}));
  }, 'canShare with unexpected field');
 
  test(() => {
- assert_equals(navigator.canShare({url: 'data:the url'}), true);
- }, 'canShare with data URL');
-
- test(() => {
- assert_equals(navigator.canShare({url: ''}), true);
+ assert_true(navigator.canShare({url: ''}));
  }, 'canShare with empty URL');
 
  test(() => {
- assert_equals(navigator.canShare({url: '//www.example.com/some/path?some_query#some_fragment'}), true);
+ assert_true(navigator.canShare({url: '//www.example.com/some/path?some_query#some_fragment'}));
  }, 'canShare with URL having no scheme');
  </script>
  </body>