chore: remove mips64el patches as they've largely been upstreamed (#18628)

patches/chromium/disable_hidden.patch

@@ -0,0 +1,34 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Cheng Zhao <zcbenz@gmail.com>
+Date: Thu, 20 Sep 2018 17:45:47 -0700
+Subject: disable_hidden.patch
+
+
+diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
+index d1cf894d19b1cfa5e11dd44844ff15ed6a42dd58..553167fa07a3acee25434cfd71a968a112d56752 100644
+--- a/content/browser/renderer_host/render_widget_host_impl.cc
++++ b/content/browser/renderer_host/render_widget_host_impl.cc
+@@ -672,6 +672,9 @@ void RenderWidgetHostImpl::WasHidden() {
+   if (is_hidden_)
+     return;
+ 
++  if (disable_hidden_)
++    return;
++
+   RejectMouseLockOrUnlockIfNecessary();
+ 
+   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasHidden");
+diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
+index 654c60e7bdecf009f2b837e38e9db50f3409978d..65fb1c070196b814edc6d94012150fa496897577 100644
+--- a/content/browser/renderer_host/render_widget_host_impl.h
++++ b/content/browser/renderer_host/render_widget_host_impl.h
+@@ -155,6 +155,9 @@ class CONTENT_EXPORT RenderWidgetHostImpl
+   // RenderWidgetHostImpl.
+   static RenderWidgetHostImpl* From(RenderWidgetHost* rwh);
+ 
++  // Electron: Prevents the widget from getting hidden.
++  bool disable_hidden_ = false;
++
+   void set_hung_renderer_delay(const base::TimeDelta& delay) {
+     hung_renderer_delay_ = delay;
+   }