Add explicit fallthrough statements in core/svg.

No behavior change.

Bug: 177475
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: Ie21f59f1b5b18663d29c3fae5c331184ae90b9b9
Reviewed-on: https://chromium-review.googlesource.com/894302Reviewed-by: Stephen Chenney <schenney@chromium.org>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#533085}

third_party/WebKit/Source/core/svg/SVGPathStringSource.cpp

@@ -196,12 +196,12 @@ PathSegmentData SVGPathStringSource::ParseSegment() {
     case kPathSegCurveToCubicAbs:
       segment.point1.SetX(ParseNumberWithError());
       segment.point1.SetY(ParseNumberWithError());
-    /* fall through */
+      FALLTHROUGH;
     case kPathSegCurveToCubicSmoothRel:
     case kPathSegCurveToCubicSmoothAbs:
       segment.point2.SetX(ParseNumberWithError());
       segment.point2.SetY(ParseNumberWithError());
-    /* fall through */
+      FALLTHROUGH;
     case kPathSegMoveToRel:
     case kPathSegMoveToAbs:
     case kPathSegLineToRel:

third_party/WebKit/Source/core/svg/SVGTransformDistance.cpp

@@ -19,9 +19,9 @@
 
 #include "core/svg/SVGTransformDistance.h"
 
+#include <math.h>
 #include "platform/geometry/FloatPoint.h"
 #include "platform/geometry/FloatSize.h"
-#include <math.h>
 
 namespace blink {
 
@@ -48,6 +48,7 @@ SVGTransformDistance::SVGTransformDistance(SVGTransform* from_svg_transform,
   switch (transform_type_) {
     case kSvgTransformMatrix:
       NOTREACHED();
+      FALLTHROUGH;
     case kSvgTransformUnknown:
       break;
     case kSvgTransformRotate: {
@@ -85,6 +86,7 @@ SVGTransformDistance SVGTransformDistance::ScaledDistance(
   switch (transform_type_) {
     case kSvgTransformMatrix:
       NOTREACHED();
+      FALLTHROUGH;
     case kSvgTransformUnknown:
       return SVGTransformDistance();
     case kSvgTransformRotate:
@@ -122,6 +124,7 @@ SVGTransform* SVGTransformDistance::AddSVGTransforms(SVGTransform* first,
   switch (first->TransformType()) {
     case kSvgTransformMatrix:
       NOTREACHED();
+      FALLTHROUGH;
     case kSvgTransformUnknown:
       return transform;
     case kSvgTransformRotate: {
@@ -168,6 +171,7 @@ SVGTransform* SVGTransformDistance::AddToSVGTransform(
   switch (transform_type_) {
     case kSvgTransformMatrix:
       NOTREACHED();
+      FALLTHROUGH;
     case kSvgTransformUnknown:
       return SVGTransform::Create();
     case kSvgTransformTranslate: {
@@ -204,6 +208,7 @@ float SVGTransformDistance::Distance() const {
   switch (transform_type_) {
     case kSvgTransformMatrix:
       NOTREACHED();
+      FALLTHROUGH;
     case kSvgTransformUnknown:
       return 0;
     case kSvgTransformRotate: