Remove unused "clamped" out-param from TransformationMatrix::ProjectQuad

The value of clamped was never used and we can remove it to save some
branching.

Change-Id: I7f041ed5762782d0073a225e09285a6d99a5cdb5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2445850
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Auto-Submit: Philip Rogers <pdr@chromium.org>
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813239}

third_party/blink/renderer/platform/transforms/transformation_matrix.cc

@@ -845,8 +845,7 @@ FloatPoint TransformationMatrix::ProjectPoint(const FloatPoint& p,
   return FloatPoint(static_cast<float>(out_x), static_cast<float>(out_y));
 }
 
-FloatQuad TransformationMatrix::ProjectQuad(const FloatQuad& q,
-                                            bool* clamped) const {
+FloatQuad TransformationMatrix::ProjectQuad(const FloatQuad& q) const {
   FloatQuad projected_quad;
 
   bool clamped1 = false;
@@ -859,9 +858,6 @@ FloatQuad TransformationMatrix::ProjectQuad(const FloatQuad& q,
   projected_quad.SetP3(ProjectPoint(q.P3(), &clamped3));
   projected_quad.SetP4(ProjectPoint(q.P4(), &clamped4));
 
-  if (clamped)
-    *clamped = clamped1 || clamped2 || clamped3 || clamped4;
-
   // If all points on the quad had w < 0, then the entire quad would not be
   // visible to the projected surface.
   bool everything_was_clipped = clamped1 && clamped2 && clamped3 && clamped4;

third_party/blink/renderer/platform/transforms/transformation_matrix.h

@@ -215,14 +215,13 @@ class PLATFORM_EXPORT TransformationMatrix {
   // dropped, effectively projecting the quad into the z=0 plane
   FloatQuad MapQuad(const FloatQuad&) const;
 
-  // Map a point on the z=0 plane into a point on
-  // the plane with with the transform applied, by extending
-  // a ray perpendicular to the source plane and computing
-  // the local x,y position of the point where that ray intersects
+  // Map a point on the z=0 plane into a point on the plane with with the
+  // transform applied, by extending a ray perpendicular to the source plane and
+  // computing the local x,y position of the point where that ray intersects
   // with the destination plane.
   FloatPoint ProjectPoint(const FloatPoint&, bool* clamped = nullptr) const;
-  // Projects the four corners of the quad
-  FloatQuad ProjectQuad(const FloatQuad&, bool* clamped = nullptr) const;
+  // Projects the four corners of the quad.
+  FloatQuad ProjectQuad(const FloatQuad&) const;
   // Projects the four corners of the quad and takes a bounding box,
   // while sanitizing values created when the w component is negative.
   LayoutRect ClampedBoundsOfProjectedQuad(const FloatQuad&) const;