Add a GrLayerCache to GrContext

https://codereview.chromium.org/217343006/



git-svn-id: http://skia.googlecode.com/svn/trunk@14038 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 052e669..ee4850f 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -14,6 +14,7 @@
 #include "GrContext.h"
 #include "GrBitmapTextContext.h"
 #include "GrDistanceFieldTextContext.h"
+#include "GrLayerCache.h"
 #include "GrPictureUtils.h"
 
 #include "SkGrTexturePixelRef.h"
@@ -2033,7 +2034,9 @@
     SkDebugf("Need SaveLayers: ");
     for (int i = 0; i < gpuData->numSaveLayers(); ++i) {
         if (pullForward[i]) {
-            SkDebugf("%d, ", i);
+            const GrAtlasedLayer* layer = fContext->getLayerCache()->findLayerOrCreate(picture, i);
+
+            SkDebugf("%d (%d), ", i, layer->layerID());
         }
     }
     SkDebugf("\n");