Add WebKitPlatformSupport::createOffscreenGraphicsContext3D

webkit/support/test_webkit_platform_support.cc

Index: webkit/support/test_webkit_platform_support.cc
diff --git a/webkit/support/test_webkit_platform_support.cc b/webkit/support/test_webkit_platform_support.cc
index 546fa7ec4128f68520bc5c8880d57b8d9a15f512..41cdc8e9064c88bb0f6b46f006c0c37e42b50907 100644
--- a/webkit/support/test_webkit_platform_support.cc
+++ b/webkit/support/test_webkit_platform_support.cc
@@ -387,6 +387,25 @@ TestWebKitPlatformSupport::createGraphicsContext3D() {
   }
 }
 
+WebKit::WebGraphicsContext3D*
+TestWebKitPlatformSupport::createOffscreenGraphicsContext3D(
+    const WebKit::WebGraphicsContext3D::Attributes& attributes) {
+  scoped_ptr<WebKit::WebGraphicsContext3D> context;
+  switch (webkit_support::GetGraphicsContext3DImplementation()) {
+    case webkit_support::IN_PROCESS:
+      context.reset(new webkit::gpu::WebGraphicsContext3DInProcessImpl(
+          gfx::kNullPluginWindow, NULL));
+      break;
+    case webkit_support::IN_PROCESS_COMMAND_BUFFER:
+      context.reset(
+          new webkit::gpu::WebGraphicsContext3DInProcessCommandBufferImpl());
+      break;
+  }
+  if (!context->initialize(attributes, NULL, false))
+    return NULL;
+  return context.release();
+}
+
 double TestWebKitPlatformSupport::audioHardwareSampleRate() {
   return 44100.0;
 }