Revert "Make leak counters thread-safe and turn them on by default for Debug"

iThis CL is breaking the Android debug test bots by firing an assert.

BUG=skia:1219

Review URL: https://codereview.chromium.org/138683006

git-svn-id: http://skia.googlecode.com/svn/trunk@13076 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/convexpaths.cpp b/gm/convexpaths.cpp
index 91afbfe..8eb4cba 100644
--- a/gm/convexpaths.cpp
+++ b/gm/convexpaths.cpp
@@ -9,9 +9,9 @@
 #include "SkRandom.h"
 #include "SkTArray.h"
 
-class SkDoOnce : SkNoncopyable {
+class SkOnce : SkNoncopyable {
 public:
-    SkDoOnce() { fDidOnce = false; }
+    SkOnce() { fDidOnce = false; }
 
     bool needToDo() const { return !fDidOnce; }
     bool alreadyDone() const { return fDidOnce; }
@@ -27,7 +27,7 @@
 namespace skiagm {
 
 class ConvexPathsGM : public GM {
-    SkDoOnce fOnce;
+    SkOnce fOnce;
 public:
     ConvexPathsGM() {
         this->setBGColor(0xFF000000);