Disable GPU features AcceleratingCompositing and WebGL by default.

chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc

Index: chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc
diff --git a/chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc b/chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc
index 1ffd0fe11c866c5c2f135e394222ca272e1fc506..3bae57f4f7e05ecc3523ab6ecb6cc5da26f8e70e 100644
--- a/chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc
+++ b/chrome/renderer/webgraphicscontext3d_command_buffer_impl.cc
@@ -107,8 +107,8 @@ bool WebGraphicsContext3DCommandBufferImpl::initialize(
         kWebGraphicsContext3DPerferredGLExtensions,
         attribs);
   } else {
-    bool compositing_enabled = !CommandLine::ForCurrentProcess()->HasSwitch(
-        switches::kDisableAcceleratedCompositing);
+    bool compositing_enabled = CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kEnableAcceleratedCompositing);
     ggl::Context* parent_context = NULL;
     // If GPU compositing is enabled we need to create a GL context that shares
     // resources with the compositor's context.