Revert "Reland "remove toString""

This reverts commit 92e37b6d79f12ccfaaf7671413316952d182267d.

Reason for revert: toString still used by flutter

Original change's description:
> Reland "remove toString"
> 
> This reverts commit 32a4910e57b1fdd3c8671de1ee85e05ca21d079f.
> 
> Reason for revert: SkMatrix::toString use has been removed from flutter and has been picked up in fuchsia
> 
> Original change's description:
> > Revert "remove toString"
> > 
> > This reverts commit 5191880cbf3ee4d122b0d11b4945fbab0784fda7.
> > 
> > Reason for revert: broke flutter
> > 
> > Original change's description:
> > > remove toString
> > > 
> > > toString may have been used by obsolete debugger only
> > > find out if that is so
> > > 
> > > R=​brianosman@google.com,bsalomon@google.com
> > > 
> > > Docs-Preview: https://skia.org/?cl=119894
> > > Bug:830651
> > > Change-Id: I737f19b7d3fbc869bea2f443fa3b5ed7c1393ffd
> > > Reviewed-on: https://skia-review.googlesource.com/119894
> > > Commit-Queue: Cary Clark <caryclark@google.com>
> > > Reviewed-by: Brian Salomon <bsalomon@google.com>
> > 
> > TBR=bsalomon@google.com,brianosman@google.com,caryclark@google.com,caryclark@skia.org
> > 
> > Change-Id: I9f81de6c3615ee0608bcea9081b77239b4b8816c
> > No-Presubmit: true
> > No-Tree-Checks: true
> > No-Try: true
> > Bug: 830651
> > Reviewed-on: https://skia-review.googlesource.com/129340
> > Reviewed-by: Cary Clark <caryclark@google.com>
> > Commit-Queue: Cary Clark <caryclark@google.com>
> 
> TBR=bsalomon@google.com,brianosman@google.com,caryclark@google.com,caryclark@skia.org
> 
> # Not skipping CQ checks because original CL landed > 1 day ago.
> 
> Bug: 830651
> Change-Id: Ida8725b6051132d8c46faf99358a8fcc1bcabf34
> Reviewed-on: https://skia-review.googlesource.com/129623
> Reviewed-by: Cary Clark <caryclark@skia.org>
> Reviewed-by: Cary Clark <caryclark@google.com>
> Commit-Queue: Cary Clark <caryclark@google.com>

TBR=bsalomon@google.com,brianosman@google.com,caryclark@google.com,caryclark@skia.org

Change-Id: Iafc59ffc1b3db67c520ba31bf12d68e1b46c0ea2
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 830651
Reviewed-on: https://skia-review.googlesource.com/131082
Reviewed-by: Cary Clark <caryclark@google.com>
Commit-Queue: Cary Clark <caryclark@google.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/src/effects/SkDisplacementMapEffect.cpp b/src/effects/SkDisplacementMapEffect.cpp
index 6be0a26106..f1b704e1c8 100644
--- a/src/effects/SkDisplacementMapEffect.cpp
+++ b/src/effects/SkDisplacementMapEffect.cpp
@@ -405,6 +405,20 @@ SkIRect SkDisplacementMapEffect::onFilterBounds(const SkIRect& src, const SkMatr
     return src;
 }
 
+void SkDisplacementMapEffect::toString(SkString* str) const {
+    str->appendf("SkDisplacementMapEffect: (");
+    str->appendf("scale: %f ", fScale);
+    str->appendf("displacement: (");
+    if (this->getDisplacementInput()) {
+        this->getDisplacementInput()->toString(str);
+    }
+    str->appendf(") color: (");
+    if (this->getColorInput()) {
+        this->getColorInput()->toString(str);
+    }
+    str->appendf("))");
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 #if SK_SUPPORT_GPU