[graphite] Default to approx fit textures for layers/filters

Chrome switched to setting this define explicitly in
https://chromium-review.googlesource.com/c/chromium/src/+/5527566
so we can make it the default now and then remove the define in Chrome.

Bug: b/323886653
Change-Id: If2b381e7fe298d5fa72b68ad08558fe788bf7971
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/853099
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: James Godfrey-Kittle <jamesgk@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>

src/gpu/graphite/Device.cpp

diff --git a/src/gpu/graphite/Device.cpp b/src/gpu/graphite/Device.cpp
index 1f99008..809b03c 100644
--- a/src/gpu/graphite/Device.cpp
+++ b/src/gpu/graphite/Device.cpp
@@ -394,11 +394,7 @@
                 info.fInfo,
                 skgpu::Budgeted::kYes,
                 Mipmapped::kNo,
-#if defined(GRAPHITE_USE_APPROX_FIT_FOR_FILTERS)
                 SkBackingFit::kApprox,
-#else
-                SkBackingFit::kExact,
-#endif
                 props,
                 initialLoadOp,
                 "ChildDevice");

src/gpu/graphite/TextureUtils.cpp

diff --git a/src/gpu/graphite/TextureUtils.cpp b/src/gpu/graphite/TextureUtils.cpp
index ca439cc..fcd6c57 100644
--- a/src/gpu/graphite/TextureUtils.cpp
+++ b/src/gpu/graphite/TextureUtils.cpp
@@ -120,11 +120,7 @@
                                outII,
                                Budgeted::kYes,
                                Mipmapped::kNo,
-#if defined(GRAPHITE_USE_APPROX_FIT_FOR_FILTERS)
                                SkBackingFit::kApprox,
-#else
-                               SkBackingFit::kExact,
-#endif
                                outProps,
                                LoadOp::kDiscard,
                                "EvalBlurTexture");
@@ -884,11 +880,7 @@
                                              imageInfo,
                                              skgpu::Budgeted::kYes,
                                              skgpu::Mipmapped::kNo,
-#if defined(GRAPHITE_USE_APPROX_FIT_FOR_FILTERS)
                                              SkBackingFit::kApprox,
-#else
-                                             SkBackingFit::kExact,
-#endif
                                              props ? *props : this->surfaceProps(),
                                              skgpu::graphite::LoadOp::kDiscard,
                                              "ImageFilterResult");