Work more on getting things built with -Wimplicit-fallthrough.

This CL was uploaded by git cl split.

R=svillar@igalia.com

Bug: 177475
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: Ie848e8562e5cfac15458e83142bee69df76c4c88
Reviewed-on: https://chromium-review.googlesource.com/889727Reviewed-by: Fredrik Söderquist <fs@opera.com>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532226}

third_party/WebKit/Source/core/page/PageWidgetDelegate.cpp

@@ -227,6 +227,7 @@ WebInputEventResult PageWidgetDelegate::HandleInputEvent(
     case WebInputEvent::kTouchCancel:
     case WebInputEvent::kTouchScrollStarted:
       NOTREACHED();
+      return WebInputEventResult::kNotHandled;
 
     case WebInputEvent::kGesturePinchBegin:
     case WebInputEvent::kGesturePinchEnd:

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

@@ -216,12 +216,12 @@ bool SVGPathBlender::BlendState::BlendSegments(
     case kPathSegCurveToCubicAbs:
       blended_segment.point1 =
           BlendAnimatedFloatPoint(from_seg.point1, to_seg.point1);
-    /* fall through */
+      FALLTHROUGH;
     case kPathSegCurveToCubicSmoothRel:
     case kPathSegCurveToCubicSmoothAbs:
       blended_segment.point2 =
           BlendAnimatedFloatPoint(from_seg.point2, to_seg.point2);
-    /* fall through */
+      FALLTHROUGH;
     case kPathSegMoveToRel:
     case kPathSegMoveToAbs:
     case kPathSegLineToRel:

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

@@ -30,11 +30,11 @@ PathSegmentData SVGPathByteStreamSource::ParseSegment() {
     case kPathSegCurveToCubicRel:
     case kPathSegCurveToCubicAbs:
       segment.point1 = ReadFloatPoint();
-    /* fall through */
+      FALLTHROUGH;
     case kPathSegCurveToCubicSmoothRel:
     case kPathSegCurveToCubicSmoothAbs:
       segment.point2 = ReadFloatPoint();
-    /* fall through */
+      FALLTHROUGH;
     case kPathSegMoveToRel:
     case kPathSegMoveToAbs:
     case kPathSegLineToRel:

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

@@ -67,10 +67,10 @@ void SVGPathNormalizer::EmitSegment(const PathSegmentData& segment) {
       break;
     case kPathSegCurveToCubicRel:
       norm_seg.point1 += current_point_;
-    /* fall through */
+      FALLTHROUGH;
     case kPathSegCurveToCubicSmoothRel:
       norm_seg.point2 += current_point_;
-    /* fall through */
+      FALLTHROUGH;
     case kPathSegMoveToRel:
     case kPathSegLineToRel:
     case kPathSegLineToHorizontalRel:
@@ -118,7 +118,7 @@ void SVGPathNormalizer::EmitSegment(const PathSegmentData& segment) {
         norm_seg.point1 = current_point_;
       else
         norm_seg.point1 = ReflectedPoint(current_point_, control_point_);
-    /* fall through */
+      FALLTHROUGH;
     case kPathSegCurveToCubicRel:
     case kPathSegCurveToCubicAbs:
       control_point_ = norm_seg.point2;
@@ -130,7 +130,7 @@ void SVGPathNormalizer::EmitSegment(const PathSegmentData& segment) {
         norm_seg.point1 = current_point_;
       else
         norm_seg.point1 = ReflectedPoint(current_point_, control_point_);
-    /* fall through */
+      FALLTHROUGH;
     case kPathSegCurveToQuadraticRel:
     case kPathSegCurveToQuadraticAbs:
       // Save the unmodified control point.

third_party/WebKit/Source/core/svg/animation/SMILTimeContainer.cpp

@@ -316,7 +316,7 @@ bool SMILTimeContainer::HandleAnimationPolicy(
       case kRestartOnceTimerIfNotPaused:
         if (IsPaused())
           break;
-      /* fall through */
+        FALLTHROUGH;
       case kRestartOnceTimer:
         ScheduleAnimationPolicyTimer();
         break;