After discussing with xidachen@, it seems that adding extra tests for loading an image from svg is just repeating svg decode tests. We still need to add the tests for offscreen canvas.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/024d4ec3e59d3819a79bcdffb797b339948e774a

commit 024d4ec3e59d3819a79bcdffb797b339948e774a
Author: Reza.Zakerinasab <zakerinasab@chromium.org>
Date: Wed Sep 06 20:26:56 2017

Add createImageBitamp resize layout tests from OffscreenCanvas

This change adds createImageBitamp resize layout tests from OffscreenCanvas.

Bug:  762558 
Change-Id: I65e4142daa73da52be205777a77c30d7ef3f12e7
Reviewed-on: https://chromium-review.googlesource.com/653307
Reviewed-by: Xida Chen <xidachen@chromium.org>
Commit-Queue: Mohammad Reza Zakerinasab <zakerinasab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#500066}
[add] https://crrev.com/024d4ec3e59d3819a79bcdffb797b339948e774a/third_party/WebKit/LayoutTests/fast/canvas/webgl/texImage-imageBitmap-from-imageBitmap-from-offscreen-canvas-expected.txt
[add] https://crrev.com/024d4ec3e59d3819a79bcdffb797b339948e774a/third_party/WebKit/LayoutTests/fast/canvas/webgl/texImage-imageBitmap-from-imageBitmap-from-offscreen-canvas.html
[add] https://crrev.com/024d4ec3e59d3819a79bcdffb797b339948e774a/third_party/WebKit/LayoutTests/fast/canvas/webgl/texImage-imageBitmap-from-offscreen-canvas-expected.txt
[add] https://crrev.com/024d4ec3e59d3819a79bcdffb797b339948e774a/third_party/WebKit/LayoutTests/fast/canvas/webgl/texImage-imageBitmap-from-offscreen-canvas-resize.html
[add] https://crrev.com/024d4ec3e59d3819a79bcdffb797b339948e774a/third_party/WebKit/LayoutTests/fast/canvas/webgl/texImage-imageBitmap-from-offscreen-canvas.html