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/core/SkFontHost.cpp b/src/core/SkFontHost.cpp
index 5fabb0f..734b3aa 100644
--- a/src/core/SkFontHost.cpp
+++ b/src/core/SkFontHost.cpp
@@ -68,6 +68,9 @@
 
 #include "SkFontMgr.h"
 
+
+SK_DEFINE_INST_COUNT(SkFontStyleSet)
+
 class SkEmptyFontStyleSet : public SkFontStyleSet {
 public:
     virtual int count() SK_OVERRIDE { return 0; }
@@ -89,6 +92,8 @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
+SK_DEFINE_INST_COUNT(SkFontMgr)
+
 class SkEmptyFontMgr : public SkFontMgr {
 protected:
     virtual int onCountFamilies() SK_OVERRIDE {
diff --git a/src/doc/SkDocument.cpp b/src/doc/SkDocument.cpp
index b051300..e94c89b 100644
--- a/src/doc/SkDocument.cpp
+++ b/src/doc/SkDocument.cpp
@@ -8,6 +8,8 @@
 #include "SkDocument.h"
 #include "SkStream.h"
 
+SK_DEFINE_INST_COUNT(SkDocument)
+
 SkDocument::SkDocument(SkWStream* stream, void (*doneProc)(SkWStream*)) {
     fStream = stream;   // we do not own this object.
     fDoneProc = doneProc;
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();
diff --git a/src/gpu/GrOvalRenderer.cpp b/src/gpu/GrOvalRenderer.cpp
index bcd64d7..85526dc 100644
--- a/src/gpu/GrOvalRenderer.cpp
+++ b/src/gpu/GrOvalRenderer.cpp
@@ -286,6 +286,10 @@
 
 ///////////////////////////////////////////////////////////////////////////////
 
+void GrOvalRenderer::reset() {
+    GrSafeSetNull(fRRectIndexBuffer);
+}
+
 bool GrOvalRenderer::drawOval(GrDrawTarget* target, const GrContext* context, bool useAA,
                               const GrRect& oval, const SkStrokeRec& stroke)
 {
diff --git a/src/lazy/SkBitmapFactory.cpp b/src/lazy/SkBitmapFactory.cpp
index 60c4993..0ff4ee2 100644
--- a/src/lazy/SkBitmapFactory.cpp
+++ b/src/lazy/SkBitmapFactory.cpp
@@ -13,6 +13,8 @@
 #include "SkImagePriv.h"
 #include "SkLazyPixelRef.h"
 
+SK_DEFINE_INST_COUNT(SkBitmapFactory::CacheSelector)
+
 SkBitmapFactory::SkBitmapFactory(SkBitmapFactory::DecodeProc proc)
     : fDecodeProc(proc)
     , fImageCache(NULL)
diff --git a/src/lazy/SkLruImageCache.cpp b/src/lazy/SkLruImageCache.cpp
index 26f7ef5..40cfefa 100644
--- a/src/lazy/SkLruImageCache.cpp
+++ b/src/lazy/SkLruImageCache.cpp
@@ -7,6 +7,9 @@
 
 #include "SkLruImageCache.h"
 
+SK_DEFINE_INST_COUNT(SkImageCache)
+SK_DEFINE_INST_COUNT(SkLruImageCache)
+
 static intptr_t NextGenerationID() {
     static intptr_t gNextID;
     do {
diff --git a/src/lazy/SkPurgeableImageCache.cpp b/src/lazy/SkPurgeableImageCache.cpp
index 0f2c5e3..0d36e4a 100644
--- a/src/lazy/SkPurgeableImageCache.cpp
+++ b/src/lazy/SkPurgeableImageCache.cpp
@@ -13,6 +13,7 @@
     #include "SkTSearch.h"
 #endif
 
+SK_DEFINE_INST_COUNT(SkPurgeableImageCache)
 SK_DECLARE_STATIC_MUTEX(gPurgeableImageMutex);
 
 SkImageCache* SkPurgeableImageCache::Create() {