Simplify view getters on GrTextureProducer.

The only thing that affects the view returned is whether it ought to
be MIP mapped or not. So don't take a whole GrSamplerState.

The view() function won't ever change the colortype so just query
GrTextureProducer rather than having view() return a tuple.

The rest is transitively reaching through callers and callees of
GrTextureProducer::view() to only pass filter or GrMipMapped instead of
GrSamplerState. Also, some params that indicate whether MIPs are
requested are changed from bool to GrMipMapped. And some minor style
stuff (mainly de-yoda-ifying GrMipMapped checks, using
GrSurfaceProxyView operator bool()).

Change-Id: Ia184aa793cf51d42642ea3bb0521ce06da2efb10
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/274205
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrTextureMaker.cpp b/src/gpu/GrTextureMaker.cpp
index de73479..34383e1 100644
--- a/src/gpu/GrTextureMaker.cpp
+++ b/src/gpu/GrTextureMaker.cpp
@@ -14,13 +14,12 @@
 #include "src/gpu/GrRecordingContextPriv.h"
 #include "src/gpu/SkGr.h"
 
-GrSurfaceProxyView GrTextureMaker::onRefTextureProxyViewForParams(GrSamplerState params,
-                                                                  bool willBeMipped) {
+GrSurfaceProxyView GrTextureMaker::onView(GrMipMapped mipMapped) {
     if (this->width() > this->context()->priv().caps()->maxTextureSize() ||
         this->height() > this->context()->priv().caps()->maxTextureSize()) {
         return {};
     }
-    return this->refOriginalTextureProxyView(willBeMipped);
+    return this->refOriginalTextureProxyView(mipMapped);
 }
 
 std::unique_ptr<GrFragmentProcessor> GrTextureMaker::createFragmentProcessor(
@@ -41,7 +40,12 @@
         fmForDetermineDomain = &kBilerp;
     }
 
-    GrSurfaceProxyView view = this->viewForParams(filterOrNullForBicubic);
+    GrSurfaceProxyView view;
+    if (filterOrNullForBicubic) {
+        view = this->view(*filterOrNullForBicubic);
+    } else {
+        view = this->view(GrMipMapped::kNo);
+    }
     if (!view) {
         return nullptr;
     }