cc: Removed DCHECK that asserted MapPoint returns clipped as true

cc/output/gl_renderer.cc

Index: cc/output/gl_renderer.cc
diff --git a/cc/output/gl_renderer.cc b/cc/output/gl_renderer.cc
index 6bb6f439ed849eb831c38c3287eaa776d4160f6d..7774f2c35d52cfe910eb179ffe282348cff55915 100644
--- a/cc/output/gl_renderer.cc
+++ b/cc/output/gl_renderer.cc
@@ -1423,13 +1423,9 @@ bool GLRenderer::SetupQuadForAntialiasing(
 
   // Map points to device space.
   bottom_right = MathUtil::MapPoint(device_transform, bottom_right, &clipped);

[danakj, 2014/09/26 23:04:34]

can you add comment explaining why we are ignoring the clipped value here and
point it at the bug

-  DCHECK(!clipped);

[danakj, 2014/09/26 21:09:19]

If it's clipped then the coordinates returned by MapPoint are not valid:
https://code.google.com/p/chromium/codesearch#chromium/src/cc/base/math_util....

   bottom_left = MathUtil::MapPoint(device_transform, bottom_left, &clipped);
-  DCHECK(!clipped);
   top_left = MathUtil::MapPoint(device_transform, top_left, &clipped);
-  DCHECK(!clipped);
   top_right = MathUtil::MapPoint(device_transform, top_right, &clipped);
-  DCHECK(!clipped);
 
   LayerQuad::Edge bottom_edge(bottom_right, bottom_left);
   LayerQuad::Edge left_edge(bottom_left, top_left);