blimp: Enable the updated compositing path by default.

blimp/client/core/context/blimp_client_context_impl.cc

Index: blimp/client/core/context/blimp_client_context_impl.cc
diff --git a/blimp/client/core/context/blimp_client_context_impl.cc b/blimp/client/core/context/blimp_client_context_impl.cc
index 81769e53483afa6bf70bf0211f742a2be050e0bc..0ea7f8750c2db2aa95805c7f265fd503927ce661 100644
--- a/blimp/client/core/context/blimp_client_context_impl.cc
+++ b/blimp/client/core/context/blimp_client_context_impl.cc
@@ -139,6 +139,10 @@ BlimpClientContextImpl::BlimpClientContextImpl(
       FROM_HERE, base::Bind(&ClientNetworkComponents::Initialize,
                             base::Unretained(net_components_.get())));
 
+  // Enable the updated compositing path before any tabs are created.
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(

[David Trainor- moved to gerrit, 2016/11/04 04:23:54]

Might be nice to have a function like the one for the engine.  A place where we
can put all blimp-specific command line defaults.

[Khushal, 2016/11/04 04:26:48]

That's a cool idea. Is there a better place to do this? Otherwise I can put it
in a function here in the .cc file itself.

+      switches::kEnableUpdatedCompositingPath);
+
   UMA_HISTOGRAM_BOOLEAN("Blimp.Supported", true);
 }