Update TestExpectations for canvas-scale-strokePath-shadow.html

Currently, the expected.txt for this layout test is different comparing
the virtual/gpu with platform/win-xp/virtual/gpu. Also, This test is marked
as failure under platform/win-xp/virtual/gpu/, and the reason is that the
actual output is the same as virtual/gpu. So this CL removes the expected.txt
under platform/win-xp/virtual/gpu and the failure line under TestExpectations.

BUG=568678

Review URL: https://codereview.chromium.org/1551793002

Cr-Commit-Position: refs/heads/master@{#367087}

third_party/WebKit/LayoutTests/TestExpectations

@@ -1270,8 +1270,6 @@ crbug.com/558574 [ Win7 ] fast/text/emphasis.html [ Failure ]
 crbug.com/561595 [ XP ] plugins/webview-plugin-scroll.html [ Failure ]
 crbug.com/561595 [ XP ] plugins/webview-plugin-nested-iframe-scroll.html [ Failure ]
 
-crbug.com/568678 [ XP ] virtual/gpu/fast/canvas/canvas-scale-strokePath-shadow.html [ Failure ]
-
 crbug.com/568778 [ XP ] media/video-aspect-ratio.html [ Failure ]
 crbug.com/568778 [ XP ] media/video-colorspace-yuv420.html [ Failure ]
 crbug.com/568778 [ XP ] media/video-colorspace-yuv422.html [ Failure ]

third_party/WebKit/LayoutTests/platform/win-xp/virtual/gpu/fast/canvas/canvas-scale-strokePath-shadow-expected.txt

-Ensure correct behavior of canvas with path stroke + shadow after scaling. A blue and red checkered pattern should be displayed.
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is 255
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is 255
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is 255
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is around 76
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is around 76
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is around 76
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is around 200
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is around 49
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is around 199
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is around 70
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is around 70
-PASS d[0] is 255
-PASS d[1] is 0
-PASS d[2] is 0
-PASS d[3] is around 69
-PASS successfullyParsed is true
-
-TEST COMPLETE
-