Expand pixelref to return SkImageInfo and rowbytes

src/lazy/SkDiscardablePixelRef.cpp

Index: src/lazy/SkDiscardablePixelRef.cpp
diff --git a/src/lazy/SkDiscardablePixelRef.cpp b/src/lazy/SkDiscardablePixelRef.cpp
index 4e19c7f65b9c011e6e2ab424a5e05a67218f2986..ba203ef68de048346e1092171df9d6991dadaa16 100644
--- a/src/lazy/SkDiscardablePixelRef.cpp
+++ b/src/lazy/SkDiscardablePixelRef.cpp
@@ -29,22 +29,34 @@ SkDiscardablePixelRef::~SkDiscardablePixelRef() {
     SkDELETE(fGenerator);
 }
 
-void* SkDiscardablePixelRef::onLockPixels(SkColorTable**) {
+bool SkDiscardablePixelRef::onGetInfo(SkImageInfo* info) {
+    *info = fInfo;
+    return true;
+}
+
+bool SkDiscardablePixelRef::onNewLockPixels(LockRec* rec) {
     if (fDiscardableMemory != NULL) {
         if (fDiscardableMemory->lock()) {
-            return fDiscardableMemory->data();
+            rec->fPixels = fDiscardableMemory->data();
+            rec->fColorTable = NULL;
+            rec->fRowBytes = fRowBytes;
+            return true;
         }
         fDiscardableMemory = NULL;
     }
     fDiscardableMemory = SkDiscardableMemory::Create(fSize);
     if (NULL == fDiscardableMemory) {
-        return NULL;  // Memory allocation failed.
+        return false;  // Memory allocation failed.
     }
     void* pixels = fDiscardableMemory->data();
     if (!fGenerator->getPixels(fInfo, pixels, fRowBytes)) {
-        return NULL;  // TODO(halcanary) Find out correct thing to do.
+        return false;  // TODO(halcanary) Find out correct thing to do.
     }
-    return pixels;
+
+    rec->fPixels = pixels;
+    rec->fColorTable = NULL;
+    rec->fRowBytes = fRowBytes;
+    return true;
 }
 void SkDiscardablePixelRef::onUnlockPixels() {
     if (fDiscardableMemory != NULL) {