Webgl Info should have vendorid and deviceid of gpu.

Source/core/html/canvas/WebGLRenderingContextBase.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 584 matching lines @@
         return nullptr;
     }
 
     blink::WebGraphicsContext3D::Attributes wgc3dAttributes = toWebGraphicsContext3DAttributes(attributes, document.topDocument().url().string(), settings, webGLVersion);
     blink::WebGLInfo glInfo;
     OwnPtr<blink::WebGraphicsContext3D> context = adoptPtr(blink::Platform::current()->createOffscreenGraphicsContext3D(wgc3dAttributes, 0, &glInfo));
     if (!context || shouldFailContextCreationForTesting) {
         shouldFailContextCreationForTesting = false;
         String statusMessage;
         if (!glInfo.contextInfoCollectionFailure.isEmpty()) {
-            statusMessage.append("Could not create a WebGL context.");
+            statusMessage.append("Could not create a WebGL context. ");
             statusMessage.append(glInfo.contextInfoCollectionFailure);
+            statusMessage.append("VendorId = " + String::number(glInfo.vendorId));
+            statusMessage.append(", DriverId = " + String::number(glInfo.deviceId));

[Ken Russell (switch to Gerrit), 2015/02/13 17:32:58]

DeviceId, not DriverId

[sivag, 2015/02/16 15:00:18]

Done.

         } else {
             statusMessage.append("Could not create a WebGL context");
             if (!glInfo.vendorInfo.isEmpty()) {
-                statusMessage.append(" VendorInfo = ");
+                statusMessage.append(", VendorInfo = ");
                 statusMessage.append(glInfo.vendorInfo);
             } else {
-                statusMessage.append(" VendorInfo = Not Available");
+                statusMessage.append(", VendorInfo = Not Available");
             }
             if (!glInfo.rendererInfo.isEmpty()) {
                 statusMessage.append(", RendererInfo = ");
                 statusMessage.append(glInfo.rendererInfo);
             } else {
                 statusMessage.append(", RendererInfo = Not Available");
             }
             if (!glInfo.driverVersion.isEmpty()) {
                 statusMessage.append(", DriverInfo = ");
                 statusMessage.append(glInfo.driverVersion);
@@ skipping 5413 matching lines @@
     return m_sharedWebGraphicsContext3D ? m_sharedWebGraphicsContext3D->drawingBuffer() : 0;
 }
 #else
 DrawingBuffer* WebGLRenderingContextBase::drawingBuffer() const
 {
     return m_drawingBuffer.get();
 }
 #endif
 
 } // namespace blink