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

This CL was uploaded by git cl split.

R=ericwilligers@chromium.org

Bug: 177475
Change-Id: I452c8970b61ae8a2e610fe1c9698583960c7a005
Reviewed-on: https://chromium-review.googlesource.com/890061
Commit-Queue: Eric Willigers <ericwilligers@chromium.org>
Reviewed-by: Eric Willigers <ericwilligers@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532261}

third_party/WebKit/Source/core/animation/CSSFilterListInterpolationType.cpp

@@ -23,7 +23,7 @@ const FilterOperations& GetFilterList(const CSSProperty& property,
   switch (property.PropertyID()) {
     default:
       NOTREACHED();
-    // Fall through.
+      FALLTHROUGH;
     case CSSPropertyBackdropFilter:
       return style.BackdropFilter();
     case CSSPropertyFilter:

third_party/WebKit/Source/core/animation/CSSInterpolationTypesMap.cpp

@@ -197,7 +197,7 @@ const InterpolationTypes& CSSInterpolationTypesMap::Get(
     case CSSPropertyOffsetPath:
       applicable_types->push_back(
           std::make_unique<CSSRayInterpolationType>(used_property));
-    // Fall through.
+      FALLTHROUGH;
     case CSSPropertyD:
       applicable_types->push_back(
           std::make_unique<CSSPathInterpolationType>(used_property));
@@ -396,6 +396,7 @@ CSSInterpolationTypesMap::CreateInterpolationTypesForCSSSyntax(
       case CSSSyntaxType::kInteger:
         result.push_back(std::make_unique<CSSNumberInterpolationType>(
             property, &registration, true));
+        break;
       case CSSSyntaxType::kTransformList:
         // TODO(alancutter): Support smooth interpolation of these types.
         break;

third_party/WebKit/Source/core/animation/ImageSlicePropertyFunctions.h

@@ -30,7 +30,7 @@ class ImageSlicePropertyFunctions {
     switch (property.PropertyID()) {
       default:
         NOTREACHED();
-      // Fall through.
+        FALLTHROUGH;
       case CSSPropertyBorderImageSlice:
         return ImageSlice(style.BorderImageSlices(),
                           style.BorderImageSlicesFill());