blimp: Set up the CompositorDependencies for blimp in Chrome.

blimp/client/public/blimp_client_context.h

Index: blimp/client/public/blimp_client_context.h
diff --git a/blimp/client/public/blimp_client_context.h b/blimp/client/public/blimp_client_context.h
index 52573d3a726e438e4bc4b0ffa1083320b5237447..80beb43087bff61a5e9cdd1fae1aa926be858ed1 100644
--- a/blimp/client/public/blimp_client_context.h
+++ b/blimp/client/public/blimp_client_context.h
@@ -24,6 +24,7 @@ class SupportsUserData;
 
 namespace blimp {
 namespace client {
+class CompositorDependencies;
 
 // BlimpClientContext is the core class for the Blimp client. It provides hooks
 // for creating BlimpContents and other features that are per
@@ -46,7 +47,8 @@ class BlimpClientContext : public KeyedService {
   // operations.
   static BlimpClientContext* Create(
       scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner,
-      scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner);
+      scoped_refptr<base::SingleThreadTaskRunner> file_thread_task_runner,
+      std::unique_ptr<CompositorDependencies> compositor_dependencies);
 
   // The delegate provides all the required functionality from the embedder.
   virtual void SetDelegate(BlimpClientContextDelegate* delegate) = 0;