Simplify GrClip::getConservativeBounds() signature

It turns out no one was using the intersection of rect functionality on
GrClip, and this helps simplify what the new clip stack needs to define.

Bug: skia:10205
Change-Id: If85a0c744dd68a8ad2f380b54a539ac74850e4ac
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/289440
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/src/gpu/GrSoftwarePathRenderer.cpp b/src/gpu/GrSoftwarePathRenderer.cpp
index 76b9b78..6646cae 100644
--- a/src/gpu/GrSoftwarePathRenderer.cpp
+++ b/src/gpu/GrSoftwarePathRenderer.cpp
@@ -75,9 +75,8 @@
                                                    SkIRect* clippedDevShapeBounds,
                                                    SkIRect* devClipBounds) {
     // compute bounds as intersection of rt size, clip, and path
-    clip.getConservativeBounds(renderTargetContext->width(),
-                               renderTargetContext->height(),
-                               devClipBounds);
+    *devClipBounds = clip.getConservativeBounds(renderTargetContext->width(),
+                                                renderTargetContext->height());
 
     if (!get_unclipped_shape_dev_bounds(shape, matrix, unclippedDevShapeBounds)) {
         *unclippedDevShapeBounds = SkIRect::MakeEmpty();