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

This CL was uploaded by git cl split.

R=junov@chromium.org

Bug: 177475
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: I377f439e850f0b26bc1c50f9bbb1f97a7d7dc8e1
Reviewed-on: https://chromium-review.googlesource.com/890003Reviewed-by: Justin Novosad <junov@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532904}

third_party/WebKit/Source/core/paint/AppliedDecorationPainter.cpp

@@ -117,7 +117,7 @@ void AppliedDecorationPainter::Paint() {
     case ETextDecorationStyle::kDotted:
     case ETextDecorationStyle::kDashed:
       context_.SetShouldAntialias(decoration_info_.antialias);
-    // Fall through
+      FALLTHROUGH;
     default:
       context_.DrawLineForText(start_point_, decoration_info_.width);
 

third_party/WebKit/Source/core/paint/BackgroundImageGeometry.cpp

@@ -121,6 +121,7 @@ LayoutSize CalculateFillTileSize(const LayoutBoxModelObject& obj,
       // If the image has neither an intrinsic width nor an intrinsic height,
       // its size is determined as for 'contain'.
       type = EFillSizeType::kContain;
+      FALLTHROUGH;
     }
     case EFillSizeType::kContain:
     case EFillSizeType::kCover: {
@@ -527,7 +528,7 @@ LayoutRectOutsets BackgroundImageGeometry::ComputeDestRectAdjustment(
   switch (fill_layer.Clip()) {
     case EFillBox::kContent:
       dest_adjust += positioning_box_.PaddingOutsets();
-    // fall through
+      FALLTHROUGH;
     case EFillBox::kPadding:
       dest_adjust += positioning_box_.BorderBoxOutsets();
       break;

third_party/WebKit/Source/core/paint/BoxBorderPainter.cpp

@@ -345,7 +345,7 @@ void DrawBleedAdjustedDRRect(GraphicsContext& context,
         context.FillDRRect(adjusted_outer, inner, color);
         break;
       }
-    // fall through
+      FALLTHROUGH;
     default:
       context.FillDRRect(outer, inner, color);
       break;

third_party/WebKit/Source/core/paint/ObjectPainterBase.cpp

@@ -572,12 +572,12 @@ void ObjectPainterBase::DrawLineForBoxSide(GraphicsContext& graphics_context,
       // https://bugs.webkit.org/show_bug.cgi?id=58608
       if (side == BoxSide::kTop || side == BoxSide::kLeft)
         color = color.Dark();
-    // fall through
+      FALLTHROUGH;
     case EBorderStyle::kOutset:
       if (style == EBorderStyle::kOutset &&
           (side == BoxSide::kBottom || side == BoxSide::kRight))
         color = color.Dark();
-    // fall through
+      FALLTHROUGH;
     case EBorderStyle::kSolid:
       DrawSolidBoxSide(graphics_context, x1, y1, x2, y2, side, color,
                        adjacent_width1, adjacent_width2, antialias);

third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp

@@ -1097,6 +1097,7 @@ void PaintLayerPainter::PaintFragmentWithPhase(
                        ->AncestorClippingMaskLayer();
           break;
         }
+        FALLTHROUGH;
       default:
         clipping_rule = LayerClipRecorder::kIncludeSelfForBorderRadius;
         break;