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

This CL was uploaded by git cl split.

R=fmalita@chromium.org

Bug: 177475
Change-Id: I0a26702441737b9c47b5608f0908f66e5d8340fe
Reviewed-on: https://chromium-review.googlesource.com/890062Reviewed-by: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532225}

third_party/WebKit/Source/core/layout/LayoutBlockFlowLine.cpp

@@ -701,7 +701,7 @@ void LayoutBlockFlow::UpdateLogicalWidthForAlignment(
         }
         break;
       }
-    // Fall through
+      FALLTHROUGH;
     case ETextAlign::kStart:
       if (direction == TextDirection::kLtr)
         UpdateLogicalWidthForLeftAlignedBlock(

third_party/WebKit/Source/core/layout/TableLayoutAlgorithmAuto.cpp

@@ -400,10 +400,10 @@ int TableLayoutAlgorithmAuto::CalcEffectiveLogicalWidth() {
             // mozilla doesn't do this so I decided we don't neither.
             break;
           }
-        // fall through
+          FALLTHROUGH;
         case kAuto:
           have_auto = true;
-        // fall through
+          FALLTHROUGH;
         default:
           // If the column is a percentage width, do not let the spanning cell
           // overwrite the width value.  This caused a mis-layout on amazon.com.

third_party/WebKit/Source/core/layout/svg/LayoutSVGResourcePaintServer.cpp

@@ -98,6 +98,7 @@ static SVGPaintDescription RequestPaint(const LayoutObject& object,
       color = apply_to_fill ? svg_style.FillPaintColor()
                             : svg_style.StrokePaintColor();
       has_color = true;
+      break;
     default:
       break;
   }

third_party/WebKit/Source/core/layout/svg/SVGTextChunkBuilder.cpp

@@ -33,6 +33,7 @@ float CalculateTextAnchorShift(const ComputedStyle& style, float length) {
   switch (style.SvgStyle().TextAnchor()) {
     default:
       NOTREACHED();
+      FALLTHROUGH;
     case TA_START:
       return is_ltr ? 0 : -length;
     case TA_MIDDLE:
@@ -47,6 +48,7 @@ bool NeedsTextAnchorAdjustment(const ComputedStyle& style) {
   switch (style.SvgStyle().TextAnchor()) {
     default:
       NOTREACHED();
+      FALLTHROUGH;
     case TA_START:
       return !is_ltr;
     case TA_MIDDLE: