html_viewer: check reserved network addresses.

This just copies the content/ implementation.

BUG=none

Review URL: https://codereview.chromium.org/1040723003

Cr-Commit-Position: refs/heads/master@{#322646}

mojo/services/html_viewer/blink_platform_impl.cc

@@ -17,6 +17,7 @@
 #include "net/base/data_url.h"
 #include "net/base/mime_util.h"
 #include "net/base/net_errors.h"
+#include "net/base/net_util.h"
 #include "third_party/WebKit/public/platform/WebWaitableEvent.h"
 
 namespace html_viewer {
@@ -209,6 +210,14 @@ blink::WebURLError BlinkPlatformImpl::cancelledError(const blink::WebURL& url)
   return error;
 }
 
+bool BlinkPlatformImpl::isReservedIPAddress(
+    const blink::WebString& host) const {
+  net::IPAddressNumber address;
+  if (!net::ParseURLHostnameToNumber(host.utf8(), &address))
+    return false;
+  return net::IsIPAddressReserved(address);
+}
+
 blink::WebThread* BlinkPlatformImpl::createThread(const char* name) {
   return new WebThreadImpl(name);
 }

mojo/services/html_viewer/blink_platform_impl.h

@@ -46,6 +46,7 @@ class BlinkPlatformImpl : public blink::Platform {
       const blink::WebURL& url, blink::WebString& mime_type,
       blink::WebString& charset);
   virtual blink::WebURLError cancelledError(const blink::WebURL& url) const;
+  virtual bool isReservedIPAddress(const blink::WebString& host) const;
   virtual blink::WebThread* createThread(const char* name);
   virtual blink::WebThread* currentThread();
   virtual void yieldCurrentThread();