blimp: Set up the CompositorDependencies for blimp in Chrome.

blimp/client/core/compositor/blimp_compositor_dependencies.cc

Index: blimp/client/core/compositor/blimp_compositor_dependencies.cc
diff --git a/blimp/client/core/compositor/blimp_compositor_dependencies.cc b/blimp/client/core/compositor/blimp_compositor_dependencies.cc
index 134b47a0457cb84e5e5a3e9f6e7b19bb908b186c..a765adbfba8760391aee2775f6e49a39e8bfc869 100644
--- a/blimp/client/core/compositor/blimp_compositor_dependencies.cc
+++ b/blimp/client/core/compositor/blimp_compositor_dependencies.cc
@@ -11,7 +11,9 @@
 #include "base/threading/thread.h"
 #include "blimp/client/core/compositor/blob_image_serialization_processor.h"
 #include "blimp/client/public/compositor/compositor_dependencies.h"
+#include "blimp/client/support/compositor/blimp_layer_tree_settings.h"
 #include "cc/raster/single_thread_task_graph_runner.h"
+#include "cc/trees/layer_tree_settings.h"
 
 namespace blimp {
 namespace client {
@@ -79,5 +81,14 @@ BlimpCompositorDependencies::GetImageSerializationProcessor() {
   return BlobImageSerializationProcessor::current();
 }
 
+cc::LayerTreeSettings* BlimpCompositorDependencies::GetLayerTreeSettings() {
+  if (!settings_) {
+    settings_ = base::MakeUnique<cc::LayerTreeSettings>();
+    PopulateCommonLayerTreeSettings(settings_.get());
+  }
+
+  return settings_.get();
+}
+
 }  // namespace client
 }  // namespace blimp