Added break statements to various default: cases

No behavioral changes, just stylistic.

Change-Id: I95a54bb2ee5610272ecea4886163ba79ae2544a2
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/447837
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
diff --git a/src/sksl/SkSLDehydrator.cpp b/src/sksl/SkSLDehydrator.cpp
index 42ea05c..e913734 100644
--- a/src/sksl/SkSLDehydrator.cpp
+++ b/src/sksl/SkSLDehydrator.cpp
@@ -199,6 +199,7 @@
                     this->writeCommand(Rehydrator::kSystemType_Command);
                     this->writeId(&t);
                     this->write(t.name());
+                    break;
             }
             break;
         }