Revert 255397 "Fill out the rest of the StringPiece functions fo..."

trunk/src/ui/base/resource/data_pack.cc

Index: trunk/src/ui/base/resource/data_pack.cc
===================================================================
--- trunk/src/ui/base/resource/data_pack.cc	(revision 255491)
+++ trunk/src/ui/base/resource/data_pack.cc	(working copy)
@@ -190,8 +190,7 @@
   const DataPackEntry* next_entry = target + 1;
   size_t length = next_entry->file_offset - target->file_offset;
 
-  data->set(reinterpret_cast<const char*>(mmap_->data() + target->file_offset),
-            length);
+  data->set(mmap_->data() + target->file_offset, length);
   return true;
 }