Declare password_data_count_ as int to match the return type of its

crypto/mock_keychain_mac.h

Index: crypto/mock_keychain_mac.h
===================================================================
--- crypto/mock_keychain_mac.h	(revision 147091)
+++ crypto/mock_keychain_mac.h	(working copy)
@@ -214,7 +214,7 @@
 
   // Tracks the allocations and frees of password data in |FindGenericPassword|
   // and |ItemFreeContent|.
-  mutable unsigned int password_data_count_;
+  mutable int password_data_count_;

[wtc, 2012/07/19 17:57:42]

The MockKeychain class doesn't use password_data_count_
internally, so the return type of its getter method matters
more.

 
   // Records the password being set when |AddGenericPassword()| gets called.
   mutable std::string add_generic_password_;