add tests for SkDocument

R=reed@google.com, vandebo@chromium.org

Author: edisonn@google.com

Review URL: https://codereview.chromium.org/33423002

git-svn-id: http://skia.googlecode.com/svn/trunk@11907 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/tests.gyp b/gyp/tests.gyp
index f0dc472..4c61a5c 100644
--- a/gyp/tests.gyp
+++ b/gyp/tests.gyp
@@ -48,6 +48,7 @@
         '../tests/DeferredCanvasTest.cpp',
         '../tests/DequeTest.cpp',
         '../tests/DeviceLooperTest.cpp',
+        '../tests/DocumentTest.cpp',
         '../tests/DrawBitmapRectTest.cpp',
         '../tests/DrawPathTest.cpp',
         '../tests/DrawTextTest.cpp',