Implement shareResources==true in TestWebGraphicsContext3D

cc/layers/scrollbar_layer_unittest.cc

Index: cc/layers/scrollbar_layer_unittest.cc
diff --git a/cc/layers/scrollbar_layer_unittest.cc b/cc/layers/scrollbar_layer_unittest.cc
index c71731d81e70b1a634c12bec92ec73a2fa6e5709..bfac4953a6d7b481eff9ec85fae47d0947a60831 100644
--- a/cc/layers/scrollbar_layer_unittest.cc
+++ b/cc/layers/scrollbar_layer_unittest.cc
@@ -381,7 +381,7 @@ class ScrollbarLayerTestMaxTextureSize : public LayerTreeTest {
 
 TEST_F(ScrollbarLayerTestMaxTextureSize, DirectRenderer) {
   scoped_ptr<TestWebGraphicsContext3D> context =
-      TestWebGraphicsContext3D::Create();
+      TestWebGraphicsContext3D::CreateShared();
   int max_size = 0;
   context->getIntegerv(GL_MAX_TEXTURE_SIZE, &max_size);
   SetScrollbarBounds(gfx::Size(max_size + 100, max_size + 100));
@@ -390,7 +390,7 @@ TEST_F(ScrollbarLayerTestMaxTextureSize, DirectRenderer) {
 
 TEST_F(ScrollbarLayerTestMaxTextureSize, DelegatingRenderer) {
   scoped_ptr<TestWebGraphicsContext3D> context =
-      TestWebGraphicsContext3D::Create();
+      TestWebGraphicsContext3D::CreateShared();
   int max_size = 0;
   context->getIntegerv(GL_MAX_TEXTURE_SIZE, &max_size);
   SetScrollbarBounds(gfx::Size(max_size + 100, max_size + 100));