Provide RSA2048 as per RFC

webrtc/base/opensslidentity.h

Index: webrtc/base/opensslidentity.h
diff --git a/webrtc/base/opensslidentity.h b/webrtc/base/opensslidentity.h
index d8ba138f625484fddca35a38ff3f449eeea86832..f957ef228823df8f796354c84dc5346cd5d836fd 100644
--- a/webrtc/base/opensslidentity.h
+++ b/webrtc/base/opensslidentity.h
@@ -32,7 +32,7 @@ class OpenSSLKeyPair {
     ASSERT(pkey_ != NULL);
   }
 
-  static OpenSSLKeyPair* Generate(KeyType key_type);
+  static OpenSSLKeyPair* Generate(const KeyParams& key_params);
 
   virtual ~OpenSSLKeyPair();
 
@@ -100,7 +100,7 @@ class OpenSSLCertificate : public SSLCertificate {
 class OpenSSLIdentity : public SSLIdentity {
  public:
   static OpenSSLIdentity* Generate(const std::string& common_name,
-                                   KeyType key_type);
+                                   const KeyParams& key_params);
   static OpenSSLIdentity* GenerateForTest(const SSLIdentityParams& params);
   static SSLIdentity* FromPEMStrings(const std::string& private_key,
                                      const std::string& certificate);