Implement chrome.platformKeys.getKeyPair().

chrome/common/extensions/api/platform_keys_internal.idl

Index: chrome/common/extensions/api/platform_keys_internal.idl
diff --git a/chrome/common/extensions/api/platform_keys_internal.idl b/chrome/common/extensions/api/platform_keys_internal.idl
index 0e2d827c125a628748b6d01557ea71738d12c25d..f328784547caadf5b3594f39576adef31f796081 100644
--- a/chrome/common/extensions/api/platform_keys_internal.idl
+++ b/chrome/common/extensions/api/platform_keys_internal.idl
@@ -12,6 +12,14 @@ namespace platformKeysInternal {
   // |signature| The signature, a octet string.
   callback SignCallback = void(ArrayBuffer signature);
 
+  // Called back by <code>getPublicKey</code>.
+  // |publicKey| The Subject Public Key Info (see X.509) of the requested
+  //   certificate.
+  // |algorithm| A partial WebCrypto KeyAlgorithm containing all information
+  //   that is available from the Subject Public Key Info. It does not contain
+  //   signature/hash parameters.
+  callback GetPublicKeyCallback = void(ArrayBuffer publicKey, object algorithm);
+
   interface Functions {
     // See documentation in platformKeys.
     static void selectClientCertificates(
@@ -37,5 +45,10 @@ namespace platformKeysInternal {
                      DOMString hashAlgorithmName,
                      ArrayBuffer data,
                      SignCallback callback);
+
+    // Calls back <code>callback</code> with details about the key certified by
+    // <code>certificate</code>.
+    static void getPublicKey(ArrayBuffer certificate,
+                             GetPublicKeyCallback callback);
   };
 };