Allow textures to be moved from one GL context group to another.

gpu/command_buffer/tests/gl_manager.h

Index: gpu/command_buffer/tests/gl_manager.h
===================================================================
--- gpu/command_buffer/tests/gl_manager.h	(revision 133771)
+++ gpu/command_buffer/tests/gl_manager.h	(working copy)
@@ -25,6 +25,7 @@
 
 namespace gles2 {
 
+class MailboxManager;
 class GLES2Decoder;
 class GLES2CmdHelper;
 class GLES2Implementation;
@@ -33,7 +34,8 @@
 
 class GLManager {
  public:
-  GLManager();
+  GLManager(gles2::MailboxManager* mailbox_manager,
+            gfx::GLShareGroup* share_group);
   ~GLManager();
 
   void Initialize(const gfx::Size& size);
@@ -41,10 +43,19 @@
 
   void MakeCurrent();
 
+  gles2::MailboxManager* mailbox_manager() const {
+    return mailbox_manager_.get();
+  }
+
+  gfx::GLShareGroup* share_group() const {
+    return share_group_.get();
+  }
+
  private:
   void PumpCommands();
   bool GetBufferChanged(int32 transfer_buffer_id);
 
+  scoped_refptr<gles2::MailboxManager> mailbox_manager_;
   scoped_refptr<gfx::GLShareGroup> share_group_;
   scoped_ptr<CommandBufferService> command_buffer_;
   scoped_ptr<gles2::GLES2Decoder> decoder_;