Webgl Info should have vendorid and deviceid of gpu.

LayoutTests/fast/canvas/webgl/webgl-error-response.html

 <!-- This is a test for crbug.com/412440, tests meaningful information in
 WebGL context creation error message. -->
 <script src="../../../resources/js-test.js"></script>
 <canvas id="webgl-canvas" width="200" height="200" class="nomargin"></canvas>
 <script>
 function main()
 {
   if (!window.testRunner) {
     testFailed("Requires window.testRunner");
   } else {
     initTest();
   }
 }
 
 function initTest() {
   var canvas = document.getElementById("webgl-canvas");
   testRunner.forceNextWebGLContextCreationToFail();
   canvas.addEventListener("webglcontextcreationerror", onContextCreationError, false);
   var gl = canvas.getContext("webgl");
   testRunner.dumpAsText();
 }
 
 function onContextCreationError(e) {
+  var vendoridStr = "VendorId = ";
+  var deviceidStr = "DeviceId = ";
   var vendorInfoStr = "VendorInfo = ";
   var renderInfoStr = "RendererInfo = ";
   var driverInfoStr = "DriverInfo = ";
-  var stringIndex = e.statusMessage.search(vendorInfoStr) + vendorInfoStr.length;
+  var stringIndex = e.statusMessage.search(vendoridStr) + vendoridStr.length;
+  var vendoridInfo = e.statusMessage.substring(stringIndex, e.statusMessage.search(deviceidStr) - 2);

[Ken Russell (switch to Gerrit), 2015/01/15 19:30:39]

All of these string searches are quite complex and fragile. With the comment
below addressed, the fields in this exception message should be comma-separated,
so you could use String.prototype.split(",") to split it into the various fields
and then another split(" = ") to extract the values for the fields. Could you
make that change?

[sivag, 2015/01/29 05:49:36]

Done.

+  stringIndex = e.statusMessage.search(deviceidStr) + deviceidStr.length;
+  var deviceidInfo = e.statusMessage.substring(stringIndex, e.statusMessage.search(vendorInfoStr) - 2);
+  stringIndex = e.statusMessage.search(vendorInfoStr) + vendorInfoStr.length;
   var vendorInfo = e.statusMessage.substring(stringIndex, e.statusMessage.search(renderInfoStr) - 2);
   stringIndex = e.statusMessage.search(renderInfoStr) + renderInfoStr.length;
   var rendererInfo = e.statusMessage.substring(stringIndex, e.statusMessage.search(driverInfoStr) - 2 );
   stringIndex = e.statusMessage.search(driverInfoStr) + driverInfoStr.length;
   var driverInfo = e.statusMessage.substring(stringIndex, e.statusMessage.length - 1);
   if((e.statusMessage.search("GPUInfoCollectionFailure") != -1) ||
-        vendorInfo.length > 0 ||
-        rendererInfo.length > 0 ||
-        driverInfo.length > 0)
+        (vendoridInfo.length > 0 &&
+        deviceidInfo.length > 0 &&
+        rendererInfo.length > 0 &&
+        driverInfo.length > 0 ))
     testPassed("Status message displayed for webglcontextcreationerror");
   else
     testFailed("Context creation error test failed");
 }
 main();
 </script>