Remove offscreen compositor contexts.

content/test/web_layer_tree_view_impl_for_testing.cc

Index: content/test/web_layer_tree_view_impl_for_testing.cc
diff --git a/content/test/web_layer_tree_view_impl_for_testing.cc b/content/test/web_layer_tree_view_impl_for_testing.cc
index 8c83e2279f2a526b2562186f0d19898f400915d4..28bd7c84a3c68d93936ea6955e323e24019cd6ec 100644
--- a/content/test/web_layer_tree_view_impl_for_testing.cc
+++ b/content/test/web_layer_tree_view_impl_for_testing.cc
@@ -13,7 +13,6 @@
 #include "cc/output/output_surface.h"
 #include "cc/test/test_context_provider.h"
 #include "cc/trees/layer_tree_host.h"
-#include "content/test/test_context_provider_factory.h"
 #include "content/test/test_webkit_platform_support.h"
 #include "third_party/WebKit/public/platform/Platform.h"
 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
@@ -150,13 +149,6 @@ WebLayerTreeViewImplForTesting::CreateOutputSurface(bool fallback) {
       new cc::OutputSurface(cc::TestContextProvider::Create()));
 }
 
-scoped_refptr<cc::ContextProvider>
-WebLayerTreeViewImplForTesting::OffscreenContextProvider() {
-  // Unit tests only run in single threaded mode.
-  return content::TestContextProviderFactory::GetInstance()->
-      OffscreenContextProviderForMainThread();
-}
-
 void WebLayerTreeViewImplForTesting::registerViewportLayers(
     const blink::WebLayer* pageScaleLayer,
     const blink::WebLayer* innerViewportScrollLayer,