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 7277f1ab6521bbcc13cd7e4189d3f7cfadf3c126..9ffe8d37e16e4438120b3f7d0420881788e26112 100644
--- a/blimp/client/core/context/blimp_client_context_impl.cc
+++ b/blimp/client/core/context/blimp_client_context_impl.cc
@@ -49,6 +49,11 @@ void DropConnectionOnIOThread(ClientNetworkComponents* net_components) {
   net_components->GetBrowserConnectionHandler()->DropCurrentConnection();
 }
 
+void AppendDefaultCommandLineFlags(base::CommandLine* command_line) {
+  // Enables the updated compositing path before any tabs are created.
+  command_line->AppendSwitch(switches::kEnableUpdatedCompositingPath);
+}
+
 }  // namespace
 
 // This function is declared in //blimp/client/public/blimp_client_context.h,
@@ -139,6 +144,8 @@ BlimpClientContextImpl::BlimpClientContextImpl(
       FROM_HERE, base::Bind(&ClientNetworkComponents::Initialize,
                             base::Unretained(net_components_.get())));
 
+  AppendDefaultCommandLineFlags(base::CommandLine::ForCurrentProcess());
+
   UMA_HISTOGRAM_BOOLEAN("Blimp.Supported", true);
 }