Tune helper context buffer sizes

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc

Index: content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
diff --git a/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc b/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
index 09f13f0a188d2a79021b289b8683d4c5da6640c4..1e8bf8a9388de8f0a4be9bbf595531de7df351df 100644
--- a/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
+++ b/content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.cc
@@ -47,11 +47,6 @@ static base::LazyInstance<std::set<WebGraphicsContext3DCommandBufferImpl*> >
 
 namespace {
 
-const size_t kDefaultCommandBufferSize = 1024 * 1024;
-const size_t kDefaultStartTransferBufferSize = 1 * 1024 * 1024;
-const size_t kDefaultMinTransferBufferSize = 1 * 256 * 1024;
-const size_t kDefaultMaxTransferBufferSize = 16 * 1024 * 1024;
-
 void ClearSharedContextsIfInShareSet(
     WebGraphicsContext3DCommandBufferImpl* context) {
   // If the given context isn't in the share set, that means that it