Add RSAPrivateKey stub implementation for iOS.

RSAPrivateKey is not used on iOS, but code calling it is compiled. To avoid
ifdef'ing in the client code, the class is stubbed out.

Review URL: https://chromiumcodereview.appspot.com/10823309

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152300 0039d316-1c4b-4281-b951-d872f2087c98
2 files changed