Provide RSA2048 as per RFC

webrtc/base/sslidentity.cc

Index: webrtc/base/sslidentity.cc
diff --git a/webrtc/base/sslidentity.cc b/webrtc/base/sslidentity.cc
index ed9e5aca93f172010dcc727df197c3e7e32af9d1..a9f64faced1a3f39d1883ebcfda41e74db9e0ea2 100644
--- a/webrtc/base/sslidentity.cc
+++ b/webrtc/base/sslidentity.cc
@@ -110,7 +110,7 @@ SSLCertificate* SSLCertificate::FromPEMString(const std::string& pem_string) {
 }
 
 SSLIdentity* SSLIdentity::Generate(const std::string& common_name,
-                                   KeyType key_type) {
+                                   const KeyParams& key_params) {
   return NULL;
 }
 
@@ -130,8 +130,8 @@ SSLCertificate* SSLCertificate::FromPEMString(const std::string& pem_string) {
 }
 
 SSLIdentity* SSLIdentity::Generate(const std::string& common_name,
-                                   KeyType key_type) {
-  return OpenSSLIdentity::Generate(common_name, key_type);
+                                   const KeyParams& key_params) {
+  return OpenSSLIdentity::Generate(common_name, key_params);
 }
 
 SSLIdentity* SSLIdentity::GenerateForTest(const SSLIdentityParams& params) {