Enable vp09 codec string in WebM by default

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index 116d31a8431f2b892b4bb51655a92834a6f5405e..d7a0de4e48c36f03c3d88bed2a2952944b809f37 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -855,12 +855,6 @@ void RenderThreadImpl::Init(
   }
 #endif
 
-  if (base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kEnableHDR) ||
-      base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kEnableNewVp9CodecString)) {
-    media::EnableNewVp9CodecStringSupport();
-  }
-
   memory_pressure_listener_.reset(new base::MemoryPressureListener(
       base::Bind(&RenderThreadImpl::OnMemoryPressure, base::Unretained(this)),
       base::Bind(&RenderThreadImpl::OnSyncMemoryPressure,