Implement ContentSecurityPolicy on the browser-side.

content/common/content_security_policy/csp_context.cc

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/common/content_security_policy/csp_context.h"
+#include "content/common/content_security_policy/csp_policy.h"
+
+namespace content {
+
+CSPContext::CSPContext()
+    : has_self_(false),
+      self_scheme_(""),
+      self_source_("", "", false, -1, false, "") {}
+CSPContext::~CSPContext() {}
+
+bool CSPContext::Allow(const std::vector<CSPPolicy>& policies,
+                       CSPDirective::Name directive_name,
+                       const GURL& url,
+                       bool is_redirect) {
+  if (this->SchemeShouldByPass(url.scheme_piece()))
+    return true;
+
+  for (const auto& policy : policies) {
+    if (!policy.Allow(this, directive_name, url, is_redirect))
+      return false;
+  }
+  return true;
+}
+
+void CSPContext::SetSelf(const url::Origin origin) {
+  if (origin.unique()) {
+    // TODO(arthursonzogni): Decide what to do with unique origins.
+    has_self_ = false;
+    return;
+  }
+
+  if (origin.scheme() == "file") {
+    has_self_ = true;
+    self_scheme_ = "file";
+    self_source_ =
+        CSPSource("file", "", false, url::PORT_UNSPECIFIED, false, "");
+    return;
+  }
+
+  has_self_ = true;
+  self_scheme_ = origin.scheme();
+  self_source_ = CSPSource(origin.scheme(), origin.host(), false, origin.port(),
+                           false, "");
+}
+
+bool CSPContext::AllowSelf(const GURL& url) {
+  return has_self_ && self_source_.Allow(this, url);
+}
+
+bool CSPContext::ProtocolMatchesSelf(const GURL& url) {
+  if (!has_self_)
+    return false;
+  if (self_scheme_ == url::kHttpScheme)
+    return url.SchemeIsHTTPOrHTTPS() || url.SchemeIsSuborigin();
+  return url.SchemeIs(self_scheme_);
+}
+
+void CSPContext::LogToConsole(const std::string& message) {
+  return;
+}
+
+bool CSPContext::SchemeShouldByPass(const base::StringPiece& scheme) {
+  return false;
+}
+
+void CSPContext::ReportViolation(
+    const std::string& directive_text,
+    const std::string& effective_directive,
+    const std::string& message,
+    const GURL& blocked_url,
+    const std::vector<std::string>& report_end_points,
+    const std::string& header,
+    blink::WebContentSecurityPolicyType disposition) {
+  return;
+}
+
+}  // namespace content