Revert of Improve OriginAccessEntry support for IP addresses.

Source/platform/weborigin/OriginAccessEntry.cpp

Index: Source/platform/weborigin/OriginAccessEntry.cpp
diff --git a/Source/platform/weborigin/OriginAccessEntry.cpp b/Source/platform/weborigin/OriginAccessEntry.cpp
index 8db1d3a34c7e25ae2dca5ff39078d283788ee75e..8bcd1b294f2b3426e1febec039416669b9570801 100644
--- a/Source/platform/weborigin/OriginAccessEntry.cpp
+++ b/Source/platform/weborigin/OriginAccessEntry.cpp
@@ -31,38 +31,11 @@
 #include "config.h"
 #include "platform/weborigin/OriginAccessEntry.h"
 
-#include "platform/weborigin/KURL.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebPublicSuffixList.h"
-#include <url/third_party/mozilla/url_parse.h>
-#include <url/url_canon.h>
 
 namespace blink {
-
-namespace {
-
-// TODO(mkwst): This basically replicates GURL::HostIsIPAddress. If/when
-// we re-evaluate everything after merging the Blink and Chromium
-// repositories, perhaps we can just use that directly.
-bool HostIsIPAddress(const String& host)
-{
-    if (host.isEmpty())
-        return false;
-
-    String protocol("https://");
-    KURL url(KURL(), protocol + host + "/");
-    if (!url.isValid())
-        return false;
-
-    url::RawCanonOutputT<char, 128> ignoredOutput;
-    url::CanonHostInfo hostInfo;
-    url::Component hostComponent(protocol.length(), host.length());
-    url::CanonicalizeIPAddress(url.string().utf8().data(), hostComponent, &ignoredOutput, &hostInfo);
-    return hostInfo.IsIPAddress();
-}
-
-}
 
 OriginAccessEntry::OriginAccessEntry(const String& protocol, const String& host, SubdomainSetting subdomainSetting, IPAddressSetting ipAddressSetting)
     : m_protocol(protocol.lower())
@@ -73,7 +46,8 @@
 {
     ASSERT(subdomainSetting == AllowSubdomains || subdomainSetting == DisallowSubdomains);
 
-    m_hostIsIPAddress = HostIsIPAddress(host);
+    // Assume that any host that ends with a digit is trying to be an IP address.
+    m_hostIsIPAddress = !m_host.isEmpty() && isASCIIDigit(m_host[m_host.length() - 1]);
 
     // Look for top-level domains, either with or without an additional dot.
     if (!m_hostIsIPAddress) {