Hide SkMallocPixelRef class befind SkPixelRef factory functions.

src/core/SkMallocPixelRef.cpp

Index: src/core/SkMallocPixelRef.cpp
diff --git a/src/core/SkMallocPixelRef.cpp b/src/core/SkMallocPixelRef.cpp
index aa7c4f745cd5e809cb62f8c8f26c455a1197a77f..fb046c6308839f91dd3c5d091fc06eea6fbb76c3 100644
--- a/src/core/SkMallocPixelRef.cpp
+++ b/src/core/SkMallocPixelRef.cpp
@@ -49,6 +49,14 @@ SkMallocPixelRef* SkMallocPixelRef::NewDirect(const SkImageInfo& info,
                       (info, addr, rowBytes, ctable, NULL, NULL));
 }
 
+
+SkPixelRef* SkPixelRef::NewPrelockedAllocate(
+        const SkImageInfo& info,
+        size_t rowBytes,
+        SkColorTable* ctable) {
+    return SkMallocPixelRef::NewAllocate(info, rowBytes, ctable);
+}
+
 SkMallocPixelRef* SkMallocPixelRef::NewAllocate(const SkImageInfo& info,
                                                 size_t requestedRowBytes,
                                                 SkColorTable* ctable) {
@@ -88,6 +96,17 @@ SkMallocPixelRef* SkMallocPixelRef::NewAllocate(const SkImageInfo& info,
                        sk_free_releaseproc, NULL));
 }
 
+SkPixelRef* SkPixelRef::NewPrelockedDirectWithProc(
+        const SkImageInfo& info,
+        size_t rowBytes,
+        SkColorTable* ctable,
+        void* addr,
+        void (*releaseProc)(void* addr, void* context),
+        void* releaseProcContext) {
+    return SkMallocPixelRef::NewWithProc(
+            info, rowBytes, ctable, addr, releaseProc, releaseProcContext);
+}
+
 SkMallocPixelRef* SkMallocPixelRef::NewWithProc(const SkImageInfo& info,
                                                 size_t rowBytes,
                                                 SkColorTable* ctable,
@@ -105,6 +124,15 @@ static void sk_data_releaseproc(void*, void* dataPtr) {
     (static_cast<SkData*>(dataPtr))->unref();
 }
 
+SkPixelRef* SkPixelRef::NewPrelockedWithData(
+        const SkImageInfo& info,
+        size_t rowBytes,
+        SkColorTable* ctable,
+        SkData* data,
+        size_t offset) {
+    return SkMallocPixelRef::NewWithData(info, rowBytes, ctable, data, offset);
+}
+
 SkMallocPixelRef* SkMallocPixelRef::NewWithData(const SkImageInfo& info,
                                                 size_t rowBytes,
                                                 SkColorTable* ctable,