Refactor Pickle Read methods to use higher performance PickleIterator.

chrome/browser/password_manager/native_backend_kwallet_x.cc

Index: chrome/browser/password_manager/native_backend_kwallet_x.cc
diff --git a/chrome/browser/password_manager/native_backend_kwallet_x.cc b/chrome/browser/password_manager/native_backend_kwallet_x.cc
index 787ed5bf13358607fa4e011aa7db6dd89031a5d6..d1153cbf4e4611791574e282c22ad526c4e8430d 100644
--- a/chrome/browser/password_manager/native_backend_kwallet_x.cc
+++ b/chrome/browser/password_manager/native_backend_kwallet_x.cc
@@ -682,7 +682,7 @@ bool NativeBackendKWallet::CheckSerializedValue(const uint8_t* byte_array,
 void NativeBackendKWallet::DeserializeValue(const std::string& signon_realm,
                                             const Pickle& pickle,
                                             PasswordFormList* forms) {
-  void* iter = NULL;
+  PickleReader iter(pickle);
 
   int version = -1;
   if (!pickle.ReadInt(&iter, &version) || version != kPickleVersion) {
@@ -739,7 +739,7 @@ void NativeBackendKWallet::DeserializeValue(const std::string& signon_realm,
   }
 }
 
-bool NativeBackendKWallet::ReadGURL(const Pickle& pickle, void** iter,
+bool NativeBackendKWallet::ReadGURL(const Pickle& pickle, PickleReader* iter,
                                     GURL* url) {
   std::string url_string;
   if (!pickle.ReadString(iter, &url_string)) {