Move Cast certificate verification code from extensions to components.

components/cast_certificate/cast_cert_validator.h

Index: components/cast_certificate/cast_cert_validator.h
diff --git a/extensions/common/cast/cast_cert_validator.h b/components/cast_certificate/cast_cert_validator.h
similarity index 96%
rename from extensions/common/cast/cast_cert_validator.h
rename to components/cast_certificate/cast_cert_validator.h
index 71ca34c0dddeca48dd0cab08cdf5a2280a0adbc9..7cf6ca2bc58a23dad5d5b0d46ee66ac0062e376f 100644
--- a/extensions/common/cast/cast_cert_validator.h
+++ b/components/cast_certificate/cast_cert_validator.h
@@ -14,9 +14,7 @@
 #include "base/strings/string_piece.h"
 #include "base/time/time.h"
 
-namespace extensions {
-namespace api {
-namespace cast_crypto {
+namespace cast_certificate {
 
 // Describes the policy for a Device certificate.
 enum class CastDeviceCertPolicy {
@@ -96,8 +94,6 @@ std::unique_ptr<CertVerificationContext> CertVerificationContextImplForTest(
 bool AddTrustAnchorForTest(const uint8_t* data,
                            size_t length) WARN_UNUSED_RESULT;
 
-}  // namespace cast_crypto
-}  // namespace api
-}  // namespace extensions
+}  // namespace cast_certificate
 
 #endif  // EXTENSIONS_COMMON_CAST_CAST_CERT_VALIDATOR_H_