net cleanup: Remove unnecessary namespace prefixes.

BUG=475208

Review URL: https://codereview.chromium.org/1095823003

Cr-Commit-Position: refs/heads/master@{#326610}
diff --git a/net/android/network_library.h b/net/android/network_library.h
index 4a4ddca..f18ee19 100644
--- a/net/android/network_library.h
+++ b/net/android/network_library.h
@@ -51,7 +51,7 @@
 
 // Helper used to pass the DER-encoded bytes of an X.509 certificate or
 // a PKCS#12 archive holding a private key to the CertInstaller activity.
-NET_EXPORT void StoreCertificate(net::CertificateMimeType cert_type,
+NET_EXPORT void StoreCertificate(CertificateMimeType cert_type,
                                  const void* data,
                                  size_t data_len);