Remove unused utility methods.

cc/trees/layer_tree_host_common_unittest.cc

 // Copyright 2011 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.
 
 #include "cc/trees/layer_tree_host_common.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
@@ skipping 2948 matching lines @@
 
   gfx::Rect expected_visible_layer_rect = gfx::Rect(0, 1, 10, 1);
   gfx::Rect expected_drawable_content_rect = target_surface_rect;
   LayerImpl* drawing_layer = TestVisibleRectAndDrawableContentRect(
       target_surface_rect, layer_to_surface_transform, layer_content_rect);
   EXPECT_EQ(expected_visible_layer_rect, drawing_layer->visible_layer_rect());
   EXPECT_EQ(expected_drawable_content_rect,
             drawing_layer->drawable_content_rect());
 }
 
+static bool projection_clips(const gfx::Transform& t, const gfx::RectF& r) {

[danakj, 2017/03/14 20:14:11]

nit: ProjectionClips

[Peter Mayo, 2017/03/17 00:35:54]

Done.

+  gfx::Transform inv_t(Inverse(t));

[danakj, 2017/03/14 20:14:11]

nit: inverted (or some not-shortened word/s)

[Peter Mayo, 2017/03/17 00:35:54]

Done.

+  bool clipped = false;
+  if (!clipped)
+    MathUtil::ProjectPoint(inv_t, r.top_right(), &clipped);
+  if (!clipped)
+    MathUtil::ProjectPoint(inv_t, r.origin(), &clipped);
+  if (!clipped)
+    MathUtil::ProjectPoint(inv_t, r.bottom_right(), &clipped);
+  if (!clipped)
+    MathUtil::ProjectPoint(inv_t, r.bottom_left(), &clipped);
+  return clipped;
+}
+
 TEST_F(LayerTreeHostCommonDrawRectsTest, DrawRectsForPerspectiveUnprojection) {
   // To determine visible rect in layer space, there needs to be an
   // un-projection from surface space to layer space. When the original
   // transform was a perspective projection that was clipped, it returns a rect
   // that encloses the clipped bounds.  Un-projecting this new rect may require
   // clipping again.
 
   // This sequence of transforms causes one corner of the layer to protrude
   // across the w = 0 plane, and should be clipped.
   gfx::Rect target_surface_rect = gfx::Rect(0, 0, 150, 150);
   gfx::Rect layer_content_rect = gfx::Rect(0, 0, 20, 20);
   gfx::Transform layer_to_surface_transform;
   layer_to_surface_transform.MakeIdentity();
   layer_to_surface_transform.Translate(10, 10);
   layer_to_surface_transform.ApplyPerspectiveDepth(1.0);
   layer_to_surface_transform.Translate3d(0.0, 0.0, -5.0);
   layer_to_surface_transform.RotateAboutYAxis(45.0);
   layer_to_surface_transform.RotateAboutXAxis(80.0);
   layer_to_surface_transform.Translate(-10, -10);
 
   // Sanity check that un-projection does indeed cause w < 0, otherwise this
   // code is not testing the intended scenario.
-  bool clipped;
   gfx::RectF clipped_rect = MathUtil::MapClippedRect(
       layer_to_surface_transform, gfx::RectF(layer_content_rect));
-  MathUtil::ProjectQuad(
-      Inverse(layer_to_surface_transform), gfx::QuadF(clipped_rect), &clipped);
-  ASSERT_TRUE(clipped);
+  ASSERT_TRUE(projection_clips(layer_to_surface_transform, clipped_rect));
 
   // Only the corner of the layer is not visible on the surface because of being
   // clipped. But, the net result of rounding visible region to an axis-aligned
   // rect is that the entire layer should still be considered visible.
   gfx::Rect expected_visible_layer_rect = layer_content_rect;
   gfx::Rect expected_drawable_content_rect = target_surface_rect;
   LayerImpl* drawing_layer = TestVisibleRectAndDrawableContentRect(
       target_surface_rect, layer_to_surface_transform, layer_content_rect);
   EXPECT_EQ(expected_visible_layer_rect, drawing_layer->visible_layer_rect());
   EXPECT_EQ(expected_drawable_content_rect,
@@ skipping 7754 matching lines @@
   EXPECT_EQ(scroll_child6.id, grand_child10->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent3->scroll_tree_index());
   EXPECT_EQ(scroll_child7.id, child8->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, parent4->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, child9->scroll_tree_index());
   EXPECT_EQ(scroll_root1.id, grand_child12->scroll_tree_index());
 }
 
 }  // namespace
 }  // namespace cc