Add TabControlFeature to BlimpClientContextImpl

blimp/client/core/contents/blimp_contents_manager.h

Index: blimp/client/core/contents/blimp_contents_manager.h
diff --git a/blimp/client/core/contents/blimp_contents_manager.h b/blimp/client/core/contents/blimp_contents_manager.h
index ea70960ffbccffc7eb48072e9d5784c2de681fab..8f03035640312de13ee4c07472abf0ff7d217fb3 100644
--- a/blimp/client/core/contents/blimp_contents_manager.h
+++ b/blimp/client/core/contents/blimp_contents_manager.h
@@ -10,6 +10,8 @@
 namespace blimp {
 namespace client {
 
+class TabControlFeature;
+
 // BlimpContentsManager does the real work of creating BlimpContentsImpl, and
 // then passes the ownership to the caller. It also owns the observers to
 // monitor the life time of the contents it creates.
@@ -18,7 +20,8 @@ class BlimpContentsManager {
   BlimpContentsManager();
   ~BlimpContentsManager();
 
-  std::unique_ptr<BlimpContentsImpl> CreateBlimpContents();
+  std::unique_ptr<BlimpContentsImpl> CreateBlimpContents(
+      TabControlFeature* tab_control_feature);
 
   // The caller can query the contents through its id.
   BlimpContentsImpl* GetBlimpContents(int id);