Add WebKitPlatformSupport::createOffscreenGraphicsContext3D

webkit/tools/test_shell/test_shell_webkit_init.cc

Index: webkit/tools/test_shell/test_shell_webkit_init.cc
diff --git a/webkit/tools/test_shell/test_shell_webkit_init.cc b/webkit/tools/test_shell/test_shell_webkit_init.cc
index 297b983a6e2b954cdbaa000bd7aa650ac340b8a5..c8b981dc1ebfe5efe61afcce99d2013af1fe532d 100644
--- a/webkit/tools/test_shell/test_shell_webkit_init.cc
+++ b/webkit/tools/test_shell/test_shell_webkit_init.cc
@@ -305,6 +305,17 @@ WebKit::WebGraphicsContext3D* TestShellWebKitInit::createGraphicsContext3D() {
       gfx::kNullPluginWindow, NULL);
 }
 
+WebKit::WebGraphicsContext3D*
+TestShellWebKitInit::createOffscreenGraphicsContext3D(
+    const WebKit::WebGraphicsContext3D::Attributes& attributes) {
+  scoped_ptr<WebGraphicsContext3D> context(
+      new webkit::gpu::WebGraphicsContext3DInProcessImpl(
+          gfx::kNullPluginWindow, NULL));
+  if (!context->initialize(attributes, NULL, false))
+    return NULL;
+  return context.release();
+}
+
 void TestShellWebKitInit::GetPlugins(
     bool refresh, std::vector<webkit::WebPluginInfo>* plugins) {
   if (refresh)