Fix a memory leak in GpuBlacklist.

content/browser/gpu/gpu_blacklist.cc

Index: content/browser/gpu/gpu_blacklist.cc
===================================================================
--- content/browser/gpu/gpu_blacklist.cc	(revision 98162)
+++ content/browser/gpu/gpu_blacklist.cc	(working copy)
@@ -207,7 +207,7 @@
 }
 
 // static
-GpuBlacklist::GpuBlacklistEntry*
+GpuBlacklist::ScopedGpuBlacklistEntry
 GpuBlacklist::GpuBlacklistEntry::GetGpuBlacklistEntryFromValue(
     DictionaryValue* value, bool top_level) {
   DCHECK(value);
@@ -420,7 +420,7 @@
     LOG(WARNING) << "Entry with unknown fields " << entry->id();
     entry->contains_unknown_fields_ = true;
   }
-  return entry.release();
+  return entry;
 }
 
 GpuBlacklist::GpuBlacklistEntry::GpuBlacklistEntry()
@@ -527,7 +527,7 @@
 }
 
 void GpuBlacklist::GpuBlacklistEntry::AddException(
-    GpuBlacklistEntry* exception) {
+    ScopedGpuBlacklistEntry exception) {
   exceptions_.push_back(exception);
 }