Reland "Centralize geometry processor vertex shader transform code"

This is a reland of 0426947243e1d6b470830c4d3b1c5704ed1f23e1

Original change's description:
> Centralize geometry processor vertex shader transform code
> 
> GrGLSLGeometryProcessors no longer have to call emitTransforms() in
> their onEmitCode() function. Instead, the GpArgs struct allows them to
> set a GrShaderVar that holds the computed or explicitly provided local
> coordinates in the vertex shader.
> 
> The base GrGLSLGeometryProcessor now automatically uses that to collect
> all of the transforms that can then be lifted out of FPs to the vertex
> shader, and base their computation on the GP provided local coordinate.
> 
> As part of this, there is no more built-in magic concatenation of a
> local matrix / inverse view matrix to these coordinate transforms. GP
> implementations that relied on this now manage their own uniform for this
> matrix and compute the local coordinate before assigning to GpArgs.
> 
> The base GrGLSLGeometryProcessor is updated to provide helpers for this
> pattern.
> 
> Bug: skia:10396
> Change-Id: I56afb3fff4b806f6015ab13626ac1afde9ef5c2b
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/297027
> Commit-Queue: Michael Ludwig <michaelludwig@google.com>
> Reviewed-by: Brian Osman <brianosman@google.com>

Bug: skia:10396
Change-Id: If1347bcacb7c405a66f9d4c5b0059e9d735b3f9a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/298062
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
diff --git a/src/gpu/ccpr/GrGSCoverageProcessor.cpp b/src/gpu/ccpr/GrGSCoverageProcessor.cpp
index feaac1a..44e2def 100644
--- a/src/gpu/ccpr/GrGSCoverageProcessor.cpp
+++ b/src/gpu/ccpr/GrGSCoverageProcessor.cpp
@@ -25,7 +25,7 @@
 
     void setData(const GrGLSLProgramDataManager& pdman, const GrPrimitiveProcessor&,
                  const CoordTransformRange& transformRange) final {
-        this->setTransformDataHelper(SkMatrix::I(), pdman, transformRange);
+        this->setTransformDataHelper(pdman, transformRange);
     }
 
     void onEmitCode(EmitArgs& args, GrGPArgs* gpArgs) final {