Revert of remvoe duplicate impl for SkImageInfo flattening

src/gpu/SkGrPixelRef.cpp

Index: src/gpu/SkGrPixelRef.cpp
diff --git a/src/gpu/SkGrPixelRef.cpp b/src/gpu/SkGrPixelRef.cpp
index 74b1a4faa24c7fb8d74b8294ef560a1e0ad01bfe..012942667c72b8c134ef8333b2deb708cd11c8ee 100644
--- a/src/gpu/SkGrPixelRef.cpp
+++ b/src/gpu/SkGrPixelRef.cpp
@@ -18,29 +18,24 @@
 // to avoid deadlock with the default one provided by SkPixelRef.
 SK_DECLARE_STATIC_MUTEX(gROLockPixelsPixelRefMutex);
 
-SkROLockPixelsPixelRef::SkROLockPixelsPixelRef(const SkImageInfo& info)
-    : INHERITED(info, &gROLockPixelsPixelRefMutex) {
+SkROLockPixelsPixelRef::SkROLockPixelsPixelRef() : INHERITED(&gROLockPixelsPixelRefMutex) {
 }
 
 SkROLockPixelsPixelRef::~SkROLockPixelsPixelRef() {
 }
 
-bool SkROLockPixelsPixelRef::onNewLockPixels(LockRec* rec) {
+void* SkROLockPixelsPixelRef::onLockPixels(SkColorTable** ctable) {
+    if (ctable) {
+        *ctable = NULL;
+    }
     fBitmap.reset();
 //    SkDebugf("---------- calling readpixels in support of lockpixels\n");
     if (!this->onReadPixels(&fBitmap, NULL)) {
         SkDebugf("SkROLockPixelsPixelRef::onLockPixels failed!\n");
-        return false;
+        return NULL;
     }
     fBitmap.lockPixels();
-    if (NULL == fBitmap.getPixels()) {
-        return false;
-    }
-
-    rec->fPixels = fBitmap.getPixels();
-    rec->fColorTable = NULL;
-    rec->fRowBytes = fBitmap.rowBytes();
-    return true;
+    return fBitmap.getPixels();
 }
 
 void SkROLockPixelsPixelRef::onUnlockPixels() {
@@ -81,14 +76,6 @@
     desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
     desc.fConfig = SkBitmapConfig2GrPixelConfig(dstConfig);
 
-    SkImageInfo info;
-    if (!GrPixelConfig2ColorType(desc.fConfig, &info.fColorType)) {
-        return NULL;
-    }
-    info.fWidth = desc.fWidth;
-    info.fHeight = desc.fHeight;
-    info.fAlphaType = kPremul_SkAlphaType;
-    
     GrTexture* dst = context->createUncachedTexture(desc, NULL, 0);
     if (NULL == dst) {
         return NULL;
@@ -106,17 +93,31 @@
     dst->releaseRenderTarget();
 #endif
 
-    SkGrPixelRef* pixelRef = SkNEW_ARGS(SkGrPixelRef, (info, dst));
+    SkGrPixelRef* pixelRef = SkNEW_ARGS(SkGrPixelRef, (dst));
     SkSafeUnref(dst);
     return pixelRef;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-SkGrPixelRef::SkGrPixelRef(const SkImageInfo& info, GrSurface* surface,
-                           bool transferCacheLock)
-    : INHERITED(info)
-{
+SkGrPixelRef::SkGrPixelRef(GrSurface* surface, bool transferCacheLock) {
+    // TODO: figure out if this is responsible for Chrome canvas errors
+#if 0
+    // The GrTexture has a ref to the GrRenderTarget but not vice versa.
+    // If the GrTexture exists take a ref to that (rather than the render
+    // target)
+    fSurface = surface->asTexture();
+#else
+    fSurface = NULL;
+#endif
+    if (NULL == fSurface) {
+        fSurface = surface;
+    }
+    fUnlock = transferCacheLock;
+    SkSafeRef(surface);
+}
+
+SkGrPixelRef::SkGrPixelRef(const SkImageInfo&, GrSurface* surface, bool transferCacheLock) {
     // TODO: figure out if this is responsible for Chrome canvas errors
 #if 0
     // The GrTexture has a ref to the GrRenderTarget but not vice versa.