[CookieStore] Upgrading host-based deleting to predicate-based deleting.

net/cookies/cookie_store.cc

Index: net/cookies/cookie_store.cc
diff --git a/net/cookies/cookie_store.cc b/net/cookies/cookie_store.cc
index f1dff9ada436effcb849c6a63b3e87c8553db5d0..eed9d061b508847581e3d6817d07f2d8275f70a0 100644
--- a/net/cookies/cookie_store.cc
+++ b/net/cookies/cookie_store.cc
@@ -4,9 +4,17 @@
 
 #include "net/cookies/cookie_store.h"
 
+#include "base/bind.h"
+#include "base/callback.h"
 #include "net/cookies/cookie_options.h"
 
 namespace net {
+namespace {
+bool DoesCookieMatchHost(const std::string& host,
+                         const CanonicalCookie& cookie) {
+  return cookie.IsHostCookie() && cookie.IsDomainMatch(host);
+}
+}  // namespace
 
 CookieStore::~CookieStore() {}
 
@@ -42,6 +50,11 @@ std::string CookieStore::BuildCookieLine(
   return cookie_line;
 }
 
+CookieStore::CookiePredicate CookieStore::CreatePredicateForHostCookies(
+    const GURL& url) {
+  return base::Bind(&DoesCookieMatchHost, url.host());
+}
+
 void CookieStore::DeleteAllAsync(const DeleteCallback& callback) {
   DeleteAllCreatedBetweenAsync(base::Time(), base::Time::Max(), callback);
 }