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/tests/skia_test.cpp b/tests/skia_test.cpp
index 969c1ff..4cb55d0 100644
--- a/tests/skia_test.cpp
+++ b/tests/skia_test.cpp
@@ -29,6 +29,7 @@
 
 DEFINE_bool2(dumpOp, d, false, "dump the pathOps to a file to recover mid-crash.");
 DEFINE_bool2(extendedTest, x, false, "run extended tests for pathOps.");
+DEFINE_bool2(runFail, f, false, "check for success on tests known to fail.");
 DEFINE_bool2(verifyOp, y, false, "compare the pathOps result against a region.");
 
 #if DEBUG_COIN
@@ -140,6 +141,7 @@
     SkPathOpsDebug::gDumpOp = FLAGS_dumpOp;
     SkPathOpsDebug::gVerifyOp = FLAGS_verifyOp;
 #endif
+    SkPathOpsDebug::gRunFail = FLAGS_runFail;
     SkPathOpsDebug::gVeryVerbose = FLAGS_veryVerbose;
     SetupCrashHandler();
 
@@ -169,6 +171,11 @@
         if (FLAGS_dumpOp) {
             header.appendf(" -d");
         }
+#ifdef SK_DEBUG
+        if (FLAGS_runFail) {
+            header.appendf(" -f");
+        }
+#endif
         if (FLAGS_verbose) {
             header.appendf(" -v");
         }