Allow browser compositor to create an offscreen context3D.

content/common/webkitplatformsupport_impl.cc

Index: content/common/webkitplatformsupport_impl.cc
diff --git a/content/common/webkitplatformsupport_impl.cc b/content/common/webkitplatformsupport_impl.cc
index 3a32adf1f27cb7df91fc0a80c8eba418d020937c..2ab541bb176a08acf8ef821afebfbcfc0a437725 100644
--- a/content/common/webkitplatformsupport_impl.cc
+++ b/content/common/webkitplatformsupport_impl.cc
@@ -2,10 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/command_line.h"
 #include "content/common/child_thread.h"
+#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 #include "content/common/socket_stream_dispatcher.h"
 #include "content/common/webkitplatformsupport_impl.h"
 #include "content/public/common/content_client.h"
+#include "content/public/common/content_switches.h"
+#include "webkit/gpu/webgraphicscontext3d_in_process_impl.h"
 
 namespace content {
 
@@ -46,4 +50,23 @@ WebKitPlatformSupportImpl::CreateWebSocketBridge(
   return dispatcher->CreateBridge(handle, delegate);
 }
 
+WebKit::WebGraphicsContext3D*
+WebKitPlatformSupportImpl::createOffscreenGraphicsContext3D(
+    const WebGraphicsContext3D::Attributes& attributes) {
+  // The WebGraphicsContext3DInProcessImpl code path is used for
+  // layout tests (though not through this code) as well as for
+  // debugging and bringing up new ports.
+  if (CommandLine::ForCurrentProcess()->HasSwitch(switches::kInProcessWebGL)) {
+    return webkit::gpu::WebGraphicsContext3DInProcessImpl::CreateForWebView(
+            attributes, false);
+  } else {
+    base::WeakPtr<WebGraphicsContext3DSwapBuffersClient> null_client;
+    scoped_ptr<WebGraphicsContext3DCommandBufferImpl> context(
+        new WebGraphicsContext3DCommandBufferImpl(0, GURL(), null_client));
+    if (!context->Initialize(attributes))
+      return NULL;
+    return context.release();
+  }
+}
+
 }  // namespace content