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

gpu/command_buffer/service/context_group.cc

Index: gpu/command_buffer/service/context_group.cc
===================================================================
--- gpu/command_buffer/service/context_group.cc	(revision 132415)
+++ gpu/command_buffer/service/context_group.cc	(working copy)
@@ -9,6 +9,7 @@
 #include "base/string_util.h"
 #include "gpu/command_buffer/common/id_allocator.h"
 #include "gpu/command_buffer/service/buffer_manager.h"
+#include "gpu/command_buffer/service/display.h"
 #include "gpu/command_buffer/service/framebuffer_manager.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/program_manager.h"
@@ -20,8 +21,9 @@
 namespace gpu {
 namespace gles2 {
 
-ContextGroup::ContextGroup(bool bind_generates_resource)
-    : num_contexts_(0),
+ContextGroup::ContextGroup(Display* display, bool bind_generates_resource)
+    : display_(display ? display : new Display),
+      num_contexts_(0),
       bind_generates_resource_(bind_generates_resource),
       max_vertex_attribs_(0u),
       max_texture_units_(0u),
@@ -170,6 +172,8 @@
     renderbuffer_manager_.reset();
   }
 
+  display_->DestroyOwnedTextures(texture_manager_.get(), have_context);
+
   if (texture_manager_ != NULL) {
     texture_manager_->Destroy(have_context);
     texture_manager_.reset();