cc: Add flag to specify to ResourceProvider to always use GMBs

content/test/fake_compositor_dependencies.cc

Index: content/test/fake_compositor_dependencies.cc
diff --git a/content/test/fake_compositor_dependencies.cc b/content/test/fake_compositor_dependencies.cc
index 3cd5043c2cf7eafa71c4c27e40f3a0dbde26eb6a..63a24d204cce75648bb6d8098283f1363d93a0f9 100644
--- a/content/test/fake_compositor_dependencies.cc
+++ b/content/test/fake_compositor_dependencies.cc
@@ -46,6 +46,10 @@ bool FakeCompositorDependencies::IsPartialRasterEnabled() {
   return false;
 }
 
+bool FakeCompositorDependencies::IsGpuMemoryBufferCompositorResourcesEnabled() {
+  return false;
+}
+
 bool FakeCompositorDependencies::IsElasticOverscrollEnabled() {
   return false;
 }