This patch implements a mechanism for more granular link URL permissions (filtering on scheme/host). This fixes the bug that allowed PDFs to have working links to any "chrome://" URLs.

BUG=528505,226927

Review URL: https://codereview.chromium.org/1362433002

Cr-Commit-Position: refs/heads/master@{#351705}
void ChildProcessSecurityPolicyImpl::GrantCopyIntoFileSystem(
    int child_id, const std::string& filesystem_id) {
  GrantPermissionsForFileSystem(child_id, filesystem_id, COPY_INTO_FILE_GRANT);
}

void ChildProcessSecurityPolicyImpl::GrantCopyIntoFileSystem(
    int child_id, const std::string& filesystem_id) {
  GrantPermissionsForFileSystem(child_id, filesystem_id, COPY_INTO_FILE_GRANT);
}
