Cleanup: Remove unnecessary double-semicolons.

The entries were found by the following command line:

$ find . -regex ".*\.[cChH]\(pp\)?" | xargs git grep -e ';;' --and --not
-e 'for *(.*;;'

Which is a combination of http://stackoverflow.com/a/3858879 and
http://gitster.livejournal.com/27674.html

BUG=None
R=mtklein@google.com

Review URL: https://codereview.chromium.org/1088763005
diff --git a/gm/multipicturedraw.cpp b/gm/multipicturedraw.cpp
index f31b698..0e11b06 100644
--- a/gm/multipicturedraw.cpp
+++ b/gm/multipicturedraw.cpp
@@ -154,7 +154,7 @@
 
     SkPaint fill;
     fill.setStyle(SkPaint::kFill_Style);
-    fill.setColor(SK_ColorLTGRAY);;
+    fill.setColor(SK_ColorLTGRAY);
 
     SkPaint stroke;
     stroke.setStyle(SkPaint::kStroke_Style);