[Not committed] Make image load completion async and remove EventSender from ImageLoader

third_party/WebKit/LayoutTests/fast/canvas/canvas-drawImage-out-of-bounds-src.html

Index: third_party/WebKit/LayoutTests/fast/canvas/canvas-drawImage-out-of-bounds-src.html
diff --git a/third_party/WebKit/LayoutTests/fast/canvas/canvas-drawImage-out-of-bounds-src.html b/third_party/WebKit/LayoutTests/fast/canvas/canvas-drawImage-out-of-bounds-src.html
index 851733635dd90bd483c8478e419e55d35963d1fb..4fa3946ef5e3b16f99d8b049b7fb304a1308404a 100644
--- a/third_party/WebKit/LayoutTests/fast/canvas/canvas-drawImage-out-of-bounds-src.html
+++ b/third_party/WebKit/LayoutTests/fast/canvas/canvas-drawImage-out-of-bounds-src.html
@@ -18,6 +18,7 @@ bgctx.fillStyle = 'green';
 bgctx.fillRect(0, 0, bgcanvas.width, bgcanvas.height);
 var greenSquareURL = bgcanvas.toDataURL();
 var img = new Image();
+img.onload = imgLoaded;
 img.src = greenSquareURL;
 var ctx1 = canvas1.getContext('2d');
 var ctx2 = canvas2.getContext('2d');
@@ -36,15 +37,17 @@ ctx1.drawImage(bgcanvas, -100, 0,    200, 200, -25, 175, 100, 100);
 ctx1.drawImage(bgcanvas, 0,    0,    100, 200, 75,  175, 100, 100);
 ctx1.drawImage(bgcanvas, 0,    0,    200, 200, 175, 175, 100, 100);
 
-ctx2.drawImage(img, -100, -100, 300, 300, -25, -25, 300, 300);
-ctx2.drawImage(img, -100, -100, 200, 200, -25, -25, 100, 100);
-ctx2.drawImage(img, 0,    -100, 100, 200, 75,  -25, 100, 100);
-ctx2.drawImage(img, 0,    -100, 200, 200, 175, -25, 100, 100);
-ctx2.drawImage(img, -100, 0,    200, 100, -25, 75,  100, 100);
-ctx2.drawImage(img, 0,  0,      200, 100, 175, 75,  100, 100);
-ctx2.drawImage(img, -100, 0,    200, 200, -25, 175, 100, 100);
-ctx2.drawImage(img, 0,    0,    100, 200, 75,  175, 100, 100);
-ctx2.drawImage(img, 0,    0,    200, 200, 175, 175, 100, 100);
+function imgLoaded() {
+    ctx2.drawImage(img, -100, -100, 300, 300, -25, -25, 300, 300);
+    ctx2.drawImage(img, -100, -100, 200, 200, -25, -25, 100, 100);
+    ctx2.drawImage(img, 0,    -100, 100, 200, 75,  -25, 100, 100);
+    ctx2.drawImage(img, 0,    -100, 200, 200, 175, -25, 100, 100);
+    ctx2.drawImage(img, -100, 0,    200, 100, -25, 75,  100, 100);
+    ctx2.drawImage(img, 0,  0,      200, 100, 175, 75,  100, 100);
+    ctx2.drawImage(img, -100, 0,    200, 200, -25, 175, 100, 100);
+    ctx2.drawImage(img, 0,    0,    100, 200, 75,  175, 100, 100);
+    ctx2.drawImage(img, 0,    0,    200, 200, 175, 175, 100, 100);
+}
 
 if (window.testRunner) {
     testRunner.waitUntilDone();