remove some calls to to-be-deprecated v8::Value::To* functions

chrome/renderer/extensions/enterprise_platform_keys_natives.cc

Index: chrome/renderer/extensions/enterprise_platform_keys_natives.cc
diff --git a/chrome/renderer/extensions/enterprise_platform_keys_natives.cc b/chrome/renderer/extensions/enterprise_platform_keys_natives.cc
index 9bccc8126e5125b655ffcfcc44d21697b87f3e37..9f84f7c603449ed682c72f41a61d904d9c952d2a 100644
--- a/chrome/renderer/extensions/enterprise_platform_keys_natives.cc
+++ b/chrome/renderer/extensions/enterprise_platform_keys_natives.cc
@@ -96,12 +96,9 @@ void EnterprisePlatformKeysNatives::NormalizeAlgorithm(
   blink::WebString error_details;
   int exception_code = 0;
 
-  blink::WebCryptoAlgorithm algorithm =
-      blink::normalizeCryptoAlgorithm(call_info[0]->ToObject(),
-                                      operation,
-                                      &exception_code,
-                                      &error_details,
-                                      call_info.GetIsolate());
+  blink::WebCryptoAlgorithm algorithm = blink::normalizeCryptoAlgorithm(
+      v8::Local<v8::Object>::Cast(call_info[0]), operation, &exception_code,
+      &error_details, call_info.GetIsolate());
 
   scoped_ptr<base::DictionaryValue> algorithm_dict;
   if (!algorithm.isNull())