Upstream most of ios/web/net

ios/web/browser_state.cc

Index: ios/web/browser_state.cc
diff --git a/ios/web/browser_state.cc b/ios/web/browser_state.cc
index 5a8c03270ef169aadb6ede59f61341ee33c24d2c..83b1ee4513a14284bf5a8409401019494c46e0df 100644
--- a/ios/web/browser_state.cc
+++ b/ios/web/browser_state.cc
@@ -4,11 +4,45 @@
 
 #include "ios/web/public/browser_state.h"
 
+#include "base/memory/ref_counted.h"
+#include "ios/web/public/certificate_policy_cache.h"
+#include "ios/web/public/web_thread.h"
+
 namespace web {
 namespace {
 // Private key used for safe conversion of base::SupportsUserData to
 // web::BrowserState in web::BrowserState::FromSupportsUserData.
 const char kBrowserStateIdentifierKey[] = "BrowserStateIdentifierKey";
+// Data key names.
+const char kCertificatePolicyCacheKeyName[] = "cert_policy_cache";
+
+// Wraps a CertificatePolicyCache as a SupportsUserData::Data; this is necessary
+// since reference counted objects can't be user data.
+class CertificatePolicyCacheHandle : public base::SupportsUserData::Data {
+ public:
+  explicit CertificatePolicyCacheHandle(CertificatePolicyCache* policy_cache)
+      : policy_cache_(policy_cache) {}
+
+  scoped_refptr<CertificatePolicyCache> policy_cache_;

[Eugene But (OOO till 7-30), 2015/03/31 20:11:09]

C++ Style Guide says: Make data members private, unless they are static const.

Looks like it will be reasonable to make CertificatePolicyCacheHandle a struct
rather than class,

[stuartmorgan, 2015/03/31 21:08:13]

Done.

+};
+}
+
+// static
+scoped_refptr<CertificatePolicyCache> BrowserState::GetCertificatePolicyCache(
+    BrowserState* browser_state) {
+  DCHECK_CURRENTLY_ON_WEB_THREAD(WebThread::UI);
+  if (!browser_state->GetUserData(kCertificatePolicyCacheKeyName)) {
+    CertificatePolicyCacheHandle* cert_cache_service_handle =
+        new CertificatePolicyCacheHandle(new CertificatePolicyCache());
+
+    browser_state->SetUserData(kCertificatePolicyCacheKeyName,
+                               cert_cache_service_handle);
+  }
+
+  CertificatePolicyCacheHandle* handle =
+      static_cast<CertificatePolicyCacheHandle*>(
+          browser_state->GetUserData(kCertificatePolicyCacheKeyName));
+  return handle->policy_cache_;
 }
 
 BrowserState::BrowserState() {