Rebaseline Mac WebGL tests and mark Win+Linux as deferred.

webkit/data/layout_tests/platform/chromium-mac/LayoutTests/fast/canvas/webgl/uniform-location-expected.txt

Index: webkit/data/layout_tests/platform/chromium-mac/LayoutTests/fast/canvas/webgl/uniform-location-expected.txt
diff --git a/webkit/data/layout_tests/platform/chromium-mac/LayoutTests/fast/canvas/webgl/uniform-location-expected.txt b/webkit/data/layout_tests/platform/chromium-mac/LayoutTests/fast/canvas/webgl/uniform-location-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..dc5d30f3026f9a54a1e4baa39ba69ac79d04f21c
--- /dev/null
+++ b/webkit/data/layout_tests/platform/chromium-mac/LayoutTests/fast/canvas/webgl/uniform-location-expected.txt
@@ -0,0 +1,20 @@
+Tests calling WebGL APIs with objects from other contexts
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+PASS contextA.useProgram(programA2) is undefined.
+PASS contextA.uniformMatrix4fv(locationA, false, mat) threw exception GL error 1282 in uniformMatrix4fv.
+PASS contextA.useProgram(programA1) is undefined.
+PASS contextA.uniformMatrix4fv(locationA, false, mat) is undefined.
+PASS contextA.uniformMatrix4fv(0, false, mat) threw exception Error: SYNTAX_ERR: DOM Exception 12.
+PASS contextA.useProgram(programS) is undefined.
+PASS contextA.uniform1i(locationSx, 3) is undefined.
+PASS contextA.uniform1f(locationArray0, 4.0) is undefined.
+PASS contextA.getUniform(programS, locationSx) is 3
+PASS contextA.getUniform(programS, locationArray0) is 4.0
+PASS contextA.useProgram(programV) is undefined.
+PASS contextA.uniform4fv(locationVec4, vec) is undefined.
+PASS contextA.getUniform(programV, locationVec4) is vec
+PASS successfullyParsed is true
+
+TEST COMPLETE