Removing GL context rate limiting feature and related wrappers

content/renderer/gpu/render_widget_compositor.cc

Index: content/renderer/gpu/render_widget_compositor.cc
diff --git a/content/renderer/gpu/render_widget_compositor.cc b/content/renderer/gpu/render_widget_compositor.cc
index 8f5474891b28fdacbf92138051207eab2982752f..fb2380d20c42ac372cd36c793f4d0367919449e6 100644
--- a/content/renderer/gpu/render_widget_compositor.cc
+++ b/content/renderer/gpu/render_widget_compositor.cc
@@ -1008,16 +1008,6 @@ void RenderWidgetCompositor::RecordFrameTimingEvents(
   }
 }
 
-void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
-  cc::ContextProvider* provider =
-      compositor_deps_->GetSharedMainThreadContextProvider();
-  // provider can be NULL after the GPU process crashed enough times and we
-  // don't want to restart it any more (falling back to software).
-  if (!provider)
-    return;
-  provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
-}
-
 void RenderWidgetCompositor::SetSurfaceIdNamespace(
     uint32_t surface_id_namespace) {
   layer_tree_host_->set_surface_id_namespace(surface_id_namespace);