use SkBlendMode instead of SkXfermode
use sk_sp versions of paint setters/getters

Change-Id: I86591a0a8ec92e6039776cbf00424ea24f585b28
diff --git a/libs/hwui/FrameBuilder.cpp b/libs/hwui/FrameBuilder.cpp
index 17ad0e3..bc36f81 100644
--- a/libs/hwui/FrameBuilder.cpp
+++ b/libs/hwui/FrameBuilder.cpp
@@ -608,7 +608,7 @@
     // MergingDrawBatch::canMergeWith()
     if (bakedState->computedState.transform.isSimple()
             && bakedState->computedState.transform.positiveScale()
-            && PaintUtils::getXfermodeDirect(op.paint) == SkXfermode::kSrcOver_Mode
+            && PaintUtils::getBlendModeDirect(op.paint) == SkBlendMode::kSrcOver
             && op.bitmap->colorType() != kAlpha_8_SkColorType
             && hasMergeableClip(*bakedState)) {
         mergeid_t mergeId = reinterpret_cast<mergeid_t>(op.bitmap->getGenerationID());
@@ -683,7 +683,7 @@
     if (!bakedState) return; // quick rejected
 
     if (bakedState->computedState.transform.isPureTranslate()
-            && PaintUtils::getXfermodeDirect(op.paint) == SkXfermode::kSrcOver_Mode
+            && PaintUtils::getBlendModeDirect(op.paint) == SkBlendMode::kSrcOver
             && hasMergeableClip(*bakedState)) {
         mergeid_t mergeId = reinterpret_cast<mergeid_t>(op.bitmap->getGenerationID());
 
@@ -750,7 +750,7 @@
 
     batchid_t batchId = textBatchId(*(op.paint));
     if (bakedState->computedState.transform.isPureTranslate()
-            && PaintUtils::getXfermodeDirect(op.paint) == SkXfermode::kSrcOver_Mode
+            && PaintUtils::getBlendModeDirect(op.paint) == SkBlendMode::kSrcOver
             && hasMergeableClip(*bakedState)) {
         mergeid_t mergeId = reinterpret_cast<mergeid_t>(op.paint->getColor());
         currentLayer().deferMergeableOp(mAllocator, bakedState, batchId, mergeId);