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

This CL was uploaded by git cl split.

R=dtapuska@chromium.org

Bug: 177475
Change-Id: I2c3ed9b3cbab13e6f120cf542119fc9005490bc7
Reviewed-on: https://chromium-review.googlesource.com/890005
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Cr-Commit-Position: refs/heads/master@{#532331}

content/browser/renderer_host/input/fling_controller.cc

@@ -152,6 +152,7 @@ void FlingController::OnGestureEventAck(
           fling_curve_ && !processed) {
         CancelCurrentFling();
       }
+      break;
     default:
       break;
   }

content/browser/renderer_host/input/synthetic_smooth_move_gesture.cc

@@ -201,6 +201,7 @@ void SyntheticSmoothMoveGesture::ForwardMouseWheelInputEvents(
     case SETUP:
       NOTREACHED() << "State SETUP invalid for synthetic scroll using mouse "
                       "wheel input.";
+      break;
     case STOPPING:
       NOTREACHED() << "State STOPPING invalid for synthetic scroll using mouse "
                       "wheel input.";