Update to Chromium revision 9cedf753 (#418732)

- Simplify usage of OnBeforePluginLoad (issue #2015)
- Switch crash reporting from crashpad to breakpad on Windows and OS X.
  Adds a new chrome_elf.dll dependency on Windows (issue #1995)
- Remove CefTextfield::GetPlaceholderTextColor() method which is no
  longer supported by Chromium.

libcef/browser/ssl_host_state_delegate.cc

@@ -4,6 +4,7 @@
 
 #include "libcef/browser/ssl_host_state_delegate.h"
 
+#include "base/callback.h"
 #include "net/base/hash_value.h"
 
 using content::SSLHostStateDelegate;
@@ -75,8 +76,22 @@ void CefSSLHostStateDelegate::AllowCert(const std::string& host,
   cert_policy_for_host_[host].Allow(cert, error);
 }
 
-void CefSSLHostStateDelegate::Clear() {
-  cert_policy_for_host_.clear();
+void CefSSLHostStateDelegate::Clear(
+    const base::Callback<bool(const std::string&)>& host_filter) {
+  if (host_filter.is_null()) {
+    cert_policy_for_host_.clear();
+    return;
+  }
+
+  for (auto it = cert_policy_for_host_.begin();
+       it != cert_policy_for_host_.end();) {
+    auto next_it = std::next(it);
+
+    if (host_filter.Run(it->first))
+      cert_policy_for_host_.erase(it);
+
+    it = next_it;
+  }
 }
 
 SSLHostStateDelegate::CertJudgment CefSSLHostStateDelegate::QueryPolicy(