The two leaks are:
  missing unrefs in megalooper GM
  missing reset capability in oval renderer

This CL also expands the instance counting system to some recently adding classes (e.g., SkFontStyleSet)

R=bsalomon@google.com, jvanverth@google.com

Author: robertphillips@google.com

Review URL: https://chromiumcodereview.appspot.com/18461007

git-svn-id: http://skia.googlecode.com/svn/trunk@10030 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 39d0db3..d9924bf 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -198,6 +198,7 @@
     fDrawBufferIBAllocPool = NULL;
 
     fAARectRenderer->reset();
+    fOvalRenderer->reset();
 
     fTextureCache->purgeAllUnlocked();
     fFontCache->freeAll();
@@ -214,6 +215,7 @@
     fGpu->purgeResources();
 
     fAARectRenderer->reset();
+    fOvalRenderer->reset();
 
     fTextureCache->purgeAllUnlocked();
     fFontCache->freeAll();