Revert of Introduce components/display_compositor

content/browser/compositor/owned_mailbox.h

Index: content/browser/compositor/owned_mailbox.h
diff --git a/content/browser/compositor/owned_mailbox.h b/content/browser/compositor/owned_mailbox.h
index cbf1593111e982b98960d02b53a8e7dd38433b21..796e02edf9162e7d74019b3c7d83decc05688113 100644
--- a/content/browser/compositor/owned_mailbox.h
+++ b/content/browser/compositor/owned_mailbox.h
@@ -12,12 +12,9 @@
 #include "content/common/content_export.h"
 #include "gpu/command_buffer/common/mailbox_holder.h"
 
-namespace display_compositor {
-class GLHelper;
-}
-
 namespace content {
 
+class GLHelper;
 
 // This class holds a texture id and gpu::Mailbox, and deletes the texture
 // id when the object itself is destroyed. Should only be created if a GLHelper
@@ -25,7 +22,7 @@
 class CONTENT_EXPORT OwnedMailbox : public base::RefCounted<OwnedMailbox>,
                                     public ImageTransportFactoryObserver {
  public:
-  explicit OwnedMailbox(display_compositor::GLHelper* gl_helper);
+  explicit OwnedMailbox(GLHelper* gl_helper);
 
   const gpu::MailboxHolder& holder() const { return mailbox_holder_; }
   const gpu::Mailbox& mailbox() const { return mailbox_holder_.mailbox; }
@@ -48,7 +45,7 @@
 
   uint32_t texture_id_;
   gpu::MailboxHolder mailbox_holder_;
-  display_compositor::GLHelper* gl_helper_;
+  GLHelper* gl_helper_;
 };
 
 }  // namespace content