Added command buffer implementation of WebGL which runs in the sandbox....

chrome/renderer/renderer_webkitclient_impl.cc

Index: chrome/renderer/renderer_webkitclient_impl.cc
===================================================================
--- chrome/renderer/renderer_webkitclient_impl.cc	(revision 42776)
+++ chrome/renderer/renderer_webkitclient_impl.cc	(working copy)
@@ -24,8 +24,10 @@
 #include "chrome/renderer/render_view.h"
 #include "chrome/renderer/renderer_webstoragenamespace_impl.h"
 #include "chrome/renderer/visitedlink_slave.h"
+#include "chrome/renderer/webgraphicscontext3d_command_buffer_impl.h"
 #include "googleurl/src/gurl.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebFrame.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebStorageEventDispatcher.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebString.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebURL.h"
@@ -339,6 +341,23 @@
   }
 }
 
+WebKit::WebGraphicsContext3D*
+RendererWebKitClientImpl::createGraphicsContext3D() {
+  // TODO(kbr): remove the WebGraphicsContext3D::createDefault code path
+  // completely, and at least for a period of time, either pop up a warning
+  // dialog, or don't even start the browser, if WebGL is enabled and the
+  // sandbox isn't.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kNoSandbox)) {

[darin (slow to review), 2010/03/29 15:24:32]

nit: it seems like a more specific command line switch would be better here long
term.  much as we have --in-process-plugins, a chrome developer might like to
run webgl with the command buffer code eliminated in order to reduce complexity
in the hopes of more quickly ruling out possible sources of a bug.

[Ken Russell (switch to Gerrit), 2010/03/29 19:56:30]

Good suggestion. Filed as http://crbug.com/39721 .

+    return WebKit::WebGraphicsContext3D::createDefault();
+  } else {
+#if defined(ENABLE_GPU)
+    return new WebGraphicsContext3DCommandBufferImpl();
+#else
+    return NULL;
+#endif
+  }
+}
+
 //------------------------------------------------------------------------------
 
 WebKit::WebString RendererWebKitClientImpl::signedPublicKeyAndChallengeString(