Add a canvas object with drawRect() and inval().

BUG=
R=robertphillips@google.com

Author: jcgregorio@google.com

Review URL: https://codereview.chromium.org/110693002

git-svn-id: http://skia.googlecode.com/svn/trunk@12595 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/.gitignore b/.gitignore
index b44f4da..2e09730 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@
 out/
 third_party/externals/
 xcodebuild/
+TAGS