Updated WebGL snapshot to 15100.

third_party/webgl/sdk/tests/conformance/buffer-preserve-test.html

Index: third_party/webgl/sdk/tests/conformance/buffer-preserve-test.html
diff --git a/third_party/webgl/sdk/tests/conformance/buffer-preserve-test.html b/third_party/webgl/sdk/tests/conformance/buffer-preserve-test.html
index 17327f697689faf1abe38ae34e12b8df8b7de4d9..53a96a8bf6f534f5391e10ae29262e3bab785041 100644
--- a/third_party/webgl/sdk/tests/conformance/buffer-preserve-test.html
+++ b/third_party/webgl/sdk/tests/conformance/buffer-preserve-test.html
@@ -15,37 +15,30 @@ body {
 <script type="text/javascript">
 
 var iter = 0;
-var gl;
+var gl1;
 
 var wtu = WebGLTestUtils;
 
-function checkPixel(gl, x, y, c) {
-    var buf = new Uint8Array(4);
-    gl.readPixels(x, y, 1, 1, gl.RGBA, gl.UNSIGNED_BYTE, buf);
-
-    return buf[0] == c[0] &&
-	buf[1] == c[1] &&
-	buf[2] == c[2] &&
-	buf[3] == c[3];
-}
-
 function timer() {
     if (iter == 0) {
-	// some random hacky stuff to make sure that we get a compositing step
-	window.scrollBy(0, 10);
-	window.scrollBy(0, -10);
-	iter++;
+        // some random hacky stuff to make sure that we get a compositing step
+        window.scrollBy(0, 10);
+        window.scrollBy(0, -10);
+        iter++;
 
-	setTimeout(timer, 500);
+        setTimeout(timer, 500);
     } else if (iter == 1) {
-	// scissor was set earlier
-	gl.clearColor(0, 0, 1, 1);
-	gl.clear(gl.COLOR_BUFFER_BIT);
+        function clear(gl) {
+            // scissor was set earlier
+            gl.clearColor(0, 0, 1, 1);
+            gl.clear(gl.COLOR_BUFFER_BIT);
 
-	wtu.checkCanvasRect(gl, 0, 10, 10, 10, [0, 0, 255, 255], "cleared corner should be blue, stencil should be preserved");
-	wtu.checkCanvasRect(gl, 0, 0, 10, 10, [0, 0, 0, 0], "remainder of buffer should be cleared");
+            wtu.checkCanvasRect(gl, 0, 10, 10, 10, [0, 0, 255, 255], "cleared corner should be blue, stencil should be preserved");
+            wtu.checkCanvasRect(gl, 0, 0, 10, 10, [0, 0, 0, 0], "remainder of buffer should be cleared");
+        }
+        clear(gl1);
 
-	finishTest();
+        finishTest();
     }
 }
 
@@ -54,21 +47,26 @@ function go() {
 
     debug("");
 
-    gl = create3DContext(document.getElementById("c"));
-    if (!gl) {
-	finishTest();
-	return;
+    gl1 = create3DContext(document.getElementById("c"));
+    if (!gl1) {
+        finishTest();
+        return;
     }
 
-    shouldBeTrue('gl.getContextAttributes().preserveDrawingBuffer == false');
+    shouldBeTrue("gl1 != null");
+    shouldBeTrue('gl1.getContextAttributes().preserveDrawingBuffer == false');
 
-    gl.clearColor(1, 0, 0, 1);
-    gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT);
+    function init(gl) {
+        gl.clearColor(1, 0, 0, 1);
+        gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT | gl.STENCIL_BUFFER_BIT);
+
+        // enable scissor here, before compositing, to make sure it's correctly
+        // ignored and restored
+        gl.scissor(0, 10, 10, 10);
+        gl.enable(gl.SCISSOR_TEST);
+    }
 
-    // enable scissor here, before compositing, to make sure it's correctly
-    // ignored and restored
-    gl.scissor(0, 10, 10, 10);
-    gl.enable(gl.SCISSOR_TEST);
+    init(gl1);
 
     setTimeout(timer, 500);
 }