Use testharness.js instead of js-test.js in LayoutTests/fast/canvas tests.

third_party/WebKit/LayoutTests/virtual/gpu/fast/canvas/alpha-expected.txt

Index: third_party/WebKit/LayoutTests/virtual/gpu/fast/canvas/alpha-expected.txt
diff --git a/third_party/WebKit/LayoutTests/virtual/gpu/fast/canvas/alpha-expected.txt b/third_party/WebKit/LayoutTests/virtual/gpu/fast/canvas/alpha-expected.txt
deleted file mode 100644
index 6ef91db80e2afc207ded2d6daf7972fe2e1e356f..0000000000000000000000000000000000000000
--- a/third_party/WebKit/LayoutTests/virtual/gpu/fast/canvas/alpha-expected.txt
+++ /dev/null
@@ -1,31 +0,0 @@
-Series of tests for canvas alpha
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-
-PASS ctx1.getContextAttributes().alpha is true
-PASS imgData1.data[0] is 0
-PASS imgData1.data[1] is 0
-PASS imgData1.data[2] is 0
-PASS imgData1.data[3] is 0
-PASS ctx2.getContextAttributes().alpha is true
-PASS imgData2.data[0] is 0
-PASS imgData2.data[1] is 0
-PASS imgData2.data[2] is 0
-PASS imgData2.data[3] is 0
-PASS ctx3.getContextAttributes().alpha is false
-PASS ctx4.getContextAttributes().alpha is true
-PASS imgData4.data[0] is 0
-PASS imgData4.data[1] is 0
-PASS imgData4.data[2] is 0
-PASS imgData4.data[3] is 0
-PASS attrs.alpha is true
-PASS ctx4.getContextAttributes().alpha is true
-PASS imgData4.data[0] is 0
-PASS imgData4.data[1] is 0
-PASS imgData4.data[2] is 0
-PASS imgData4.data[3] is 0
-PASS successfullyParsed is true
-
-TEST COMPLETE
-