Revert "Remove GrPipeline from GrDrawOp."

This reverts commit 2bf4b3a97b770811d9e0558dbbfbdb57cfafbdb7.

Reason for revert: nanobench assertion

Original change's description:
> Remove GrPipeline from GrDrawOp.
> 
> GrDrawOp subclasses are now free to construct their pipelines at flush time and now in theory could use multiple GrPipelines for multipass rendering.
> 
> GrProcessorSet may be used to retain the processors from a GrPaint with "pending execution" style refs.
> 
> NVPR and Instanced rendering are updated to create their pipelines at flush time without a GrPipelineBuilder.
> 
> The monolithic pipeline creation/management that was on GrDrawOp is moved to GrMeshDrawOp. However, this is temporary and will be removed in coming changes.
> 
> Change-Id: I124282e3cea5d070970b5460c8a679fcaf7a8eff
> Reviewed-on: https://skia-review.googlesource.com/7279
> Commit-Queue: Brian Salomon <bsalomon@google.com>
> Reviewed-by: Robert Phillips <robertphillips@google.com>
> 

TBR=bsalomon@google.com,robertphillips@google.com,csmartdalton@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: I1bc64f6cbbd5f482417637a034342c2b5371dc5c
Reviewed-on: https://skia-review.googlesource.com/9817
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/gpu/GrPrimitiveProcessor.h b/src/gpu/GrPrimitiveProcessor.h
index 4c439433f5..f5b8fe9cf0 100644
--- a/src/gpu/GrPrimitiveProcessor.h
+++ b/src/gpu/GrPrimitiveProcessor.h
@@ -70,6 +70,11 @@ public:
         return false;
     }
 
+    /**
+     * Returns true if the color written to the output pixel depends on the pixels previous value.
+     */
+    bool xpReadsDst() const { return SkToBool(kXPReadsDst_Flag & fFlags); }
+
 private:
     enum {
         // If this is not set the primitive processor need not produce local coordinates
@@ -82,6 +87,8 @@ private:
         // If this flag is set the GrPrimitiveProcessor must produce fOverrideColor as its
         // output color. If not set fOverrideColor is to be ignored.
         kUseOverrideColor_Flag = 0x4,
+
+        kXPReadsDst_Flag = 0x8,
     };
 
     uint32_t    fFlags;