Switch SVGFEImage from SkBitmapSource to SkImageSource

LayoutTests/svg/filters/feimage-invalid-image.svg

Index: LayoutTests/svg/filters/feimage-invalid-image.svg
diff --git a/LayoutTests/svg/filters/feimage-invalid-image.svg b/LayoutTests/svg/filters/feimage-invalid-image.svg
new file mode 100644
index 0000000000000000000000000000000000000000..58ac5d15f1b640d436f7382c2b1c2759c896c748
--- /dev/null
+++ b/LayoutTests/svg/filters/feimage-invalid-image.svg
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg width="100%" height="100%" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">

[Stephen White, 2015/09/17 13:58:14]

Nit: suggest we specify a width/height that explicitly encloses all the content,
so we're not dependent on window size.

[f(malita), 2015/09/17 15:02:11]

Done.

+  <defs>
+    <filter id="missing_href">
+      <feImage out="out1"/>
+      <feColorMatrix type="matrix" in="out1" values="1 0 0 0 0  0 -1 0 0 1  0 0 1 0 0  0 0 0 -1 1"/>
+    </filter>
+
+    <filter id="missing_image">
+      <feImage out="out1" xlink:href="missing.png"/>
+      <feColorMatrix type="matrix" in="out1" values="1 0 0 0 0  0 -1 0 0 1  0 0 1 0 0  0 0 0 -1 1"/>
+    </filter>
+
+    <filter id="broken_decode">
+      <feImage out="out1" xlink:href="data:image/gif;base64,FOO"/>
+      <feColorMatrix type="matrix" in="out1" values="1 0 0 0 0  0 -1 0 0 1  0 0 1 0 0  0 0 0 -1 1"/>
+    </filter>
+
+    <filter id="unsupported_format">
+      <feImage out="out1" xlink:href="data:image/foo;base64,"/>
+      <feColorMatrix type="matrix" in="out1" values="1 0 0 0 0  0 -1 0 0 1  0 0 1 0 0  0 0 0 -1 1"/>
+    </filter>
+  </defs>
+
+  <rect x="100" y="50" width="200" height="100" fill="red" filter="url(#missing_href)"/>
+  <rect x="100" y="200" width="200" height="100" fill="red" filter="url(#missing_image)"/>
+  <rect x="100" y="350" width="200" height="100" fill="red" filter="url(#broken_decode)"/>
+  <rect x="100" y="500" width="200" height="100" fill="red" filter="url(#unsupported_format)"/>
+
+</svg>