Tighten bounds on 3d clipping.

cc/base/math_util.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_BASE_MATH_UTIL_H_
 #define CC_BASE_MATH_UTIL_H_
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
@@ skipping 171 matching lines @@
       const gfx::Transform& transform,
       const gfx::Rect& rect);
 
   // Returns an array of vertices that represent the clipped polygon. After
   // returning, indexes from 0 to num_vertices_in_clipped_quad are valid in the
   // clipped_quad array. Note that num_vertices_in_clipped_quad may be zero,
   // which means the entire quad was clipped, and none of the vertices in the
   // array are valid.
   static bool MapClippedQuad3d(const gfx::Transform& transform,
                                const gfx::QuadF& src_quad,
-                               gfx::Point3F clipped_quad[8],
+                               gfx::Point3F clipped_quad[6],
                                int* num_vertices_in_clipped_quad);
 
   static gfx::RectF ComputeEnclosingRectOfVertices(const gfx::PointF vertices[],
                                                    int num_vertices);
   static gfx::RectF ComputeEnclosingClippedRect(
       const HomogeneousCoordinate& h1,
       const HomogeneousCoordinate& h2,
       const HomogeneousCoordinate& h3,
       const HomogeneousCoordinate& h4);
 
@@ skipping 130 matching lines @@
  private:
 #ifdef __SSE__
   unsigned int orig_state_;
 #endif
   DISALLOW_COPY_AND_ASSIGN(ScopedSubnormalFloatDisabler);
 };
 
 }  // namespace cc
 
 #endif  // CC_BASE_MATH_UTIL_H_