Revert "offset angle check edge in common"

This reverts commit d2eb581ebc8f8009e80cccccd74d5b341ef5bd5b.

Reason for revert: broke Google3 MSAN run of dm

Original change's description:
> offset angle check edge in common
> 
> When curves cross, their intersection points may be nearby, but not exactly the same.
> Sort the angles formed by the crossing curves when all angles don't have the same
> origin.
> 
> This sets up the framework to solve test case that currently fail (e.g., joel6) but
> does not fix all related test cases (e.g., joel9).
> 
> All older existing test cases, including extended tests, pass.
> 
> Rework the test framework to better report when tests expected to produce failing
> results now pass.
> 
> Add new point and vector operations to support offset angles.
> 
> TBR=reed@google.com
> BUG=skia:6041
> 
> Change-Id: I67c651ded0a25e99ad93d55d6a35109b3ee3698e
> Reviewed-on: https://skia-review.googlesource.com/6624
> Commit-Queue: Cary Clark <caryclark@google.com>
> Reviewed-by: Cary Clark <caryclark@google.com>
> 

TBR=caryclark@google.com,reviews@skia.org
# Not skipping CQ checks because original CL landed > 1 day ago.
BUG=skia:6041

Change-Id: I43db0808522ac44aceeb4f70e296167ea84a3663
Reviewed-on: https://skia-review.googlesource.com/7373
Commit-Queue: Cary Clark <caryclark@google.com>
Reviewed-by: Cary Clark <caryclark@google.com>
diff --git a/tools/pathops_sorter.htm b/tools/pathops_sorter.htm
index e31a196..967ac31 100644
--- a/tools/pathops_sorter.htm
+++ b/tools/pathops_sorter.htm
@@ -6,16 +6,28 @@
     <title></title>
 <div style="height:0">
 
-<div id="halfplane">
-ccwOf {{{380.294464,140.44487}, {379.597463,140.82048}}} id=1

-ccwOf {{{380.294495,140.444855}, {378.965302,141.103577}}} id=2

+<div id="cubics">
+{{{403.28299,497.196991}, {403.424011,497.243988}, {391.110992,495.556}, {391.110992,495.556}}}

+{{{398.375,501.976013}, {403.28299,497.196991}}}

+{{{403.42401123046875, 497.243988037109375}, {378.7979736328125, 493.868011474609375}}}, id=0

+{{{415.5605946972181641, 498.8838844379989155}, {378.8318672594865006, 493.8897667505245295}}}, id=1

+{{{403.2954048004600622, 497.117149457477467}, {403.2729768294798873, 497.2781265045034615}}}, id=2

+{{{403.42401123046875, 497.243988037109375}, {378.7979736328125, 493.868011474609375}}}, id=3

+

+</div>
+
+<div id="c1">
+{{{403.28299f, 497.196991f}, {403.284241f, 497.197388f}, {403.28418f, 497.197632f}}}
+{{{403.28418f, 497.197632f}, {403.280487f, 497.224304f}, {391.110992f, 495.556f}, {391.110992f, 495.556f}}}    

+

 </div>
     </div>
 
 <script type="text/javascript">
 
     var testDivs = [
-    halfplane,
+    c1,
+    cubics,
     ];
 
     var decimal_places = 3;