Make analysis optional to GrPipeline::init().

GrXPFactory::createXferProcessor now takes GrPipelineAnalysisColor and GrPipelineAnalysisCoverage rather than GrProcessorSet::FragmentProcessorAnalysis.

This will make it so ops do not have to retain the analysis or rerun it to create pipelines at flush time.

Change-Id: Ib28ba65de425b20c2647329275f209aec168c3df
Reviewed-on: https://skia-review.googlesource.com/10474
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
diff --git a/src/gpu/GrProcessorSet.cpp b/src/gpu/GrProcessorSet.cpp
index 0350ba5..b47a026 100644
--- a/src/gpu/GrProcessorSet.cpp
+++ b/src/gpu/GrProcessorSet.cpp
@@ -119,8 +119,7 @@
 
     GrPipelineAnalysisColor outputColor = colorInfo.outputColor();
     if (outputColor.isConstant(&fKnownOutputColor)) {
-        fOutputColorType = static_cast<unsigned>(outputColor.isOpaque() ? ColorType::kOpaqueConstant
-                                                                        : ColorType::kConstant);
+        fOutputColorType = static_cast<unsigned>(ColorType::kConstant);
     } else if (outputColor.isOpaque()) {
         fOutputColorType = static_cast<unsigned>(ColorType::kOpaque);
     } else {