gobi-cromo-plugin: replace scoped_ptr_malloc with scoped_ptr

scoped_ptr_malloc<T> has been deprecated and will be removed.
This CL updates gobi-cromo-plugin to use the equivalent
scoped_ptr<T, base::FreeDeleter> instead.

BUG=chromium:366763
TEST=`FEATURES=test emerge-$BOARD platform2 gobi-cromo-plugin`

Change-Id: I70d98251606df5b74c1c9d491af8bfe95a4dabbf
Reviewed-on: https://chromium-review.googlesource.com/196876
Reviewed-by: Prathmesh Prabhu <pprabhu@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
diff --git a/gobi_sdk_wrapper.h b/gobi_sdk_wrapper.h
index 055a810..d2d5c5e 100644
--- a/gobi_sdk_wrapper.h
+++ b/gobi_sdk_wrapper.h
@@ -381,7 +381,7 @@
   }
 
  private:
-  scoped_ptr_malloc<char> str_;
+  scoped_ptr<char, base::FreeDeleter> str_;
   DISALLOW_COPY_AND_ASSIGN(CharStarCopier);
 };