cull edges that are to the right of the clip

BUG=skia:

Review URL: https://codereview.chromium.org/913503002
diff --git a/src/core/SkLineClipper.cpp b/src/core/SkLineClipper.cpp
index 3ff8948..4558430 100644
--- a/src/core/SkLineClipper.cpp
+++ b/src/core/SkLineClipper.cpp
@@ -1,10 +1,10 @@
-
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
+
 #include "SkLineClipper.h"
 
 template <typename T> T pin_unsorted(T value, T limit0, T limit1) {
@@ -172,12 +172,8 @@
 }
 #endif
 
-int SkLineClipper::ClipLine(const SkPoint pts[], const SkRect& clip,
-                            SkPoint lines[], bool canClipToTheRight) {
-#if 1
-    // Disable this while we investigate layouttest failures
-    canClipToTheRight = false;
-#endif
+int SkLineClipper::ClipLine(const SkPoint pts[], const SkRect& clip, SkPoint lines[],
+                            bool canCullToTheRight) {
 
 #ifdef SK_DEBUG
     {
@@ -246,7 +242,7 @@
         result = tmp;
         reverse = false;
     } else if (tmp[index0].fX >= clip.fRight) {    // wholly to the right
-        if (canClipToTheRight) {
+        if (canCullToTheRight) {
             return 0;
         }
         tmp[0].fX = tmp[1].fX = clip.fRight;