Allow the renderer process to map textures from one context into another.

gpu/command_buffer/service/gpu_scheduler.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "gpu/command_buffer/service/gpu_scheduler.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/debug/trace_event.h"
@@ skipping 111 matching lines @@
 
 bool GpuScheduler::SetParent(GpuScheduler* parent_scheduler,
                              uint32 parent_texture_id) {
   if (parent_scheduler)
     return decoder_->SetParent(parent_scheduler->decoder_.get(),
                                parent_texture_id);
   else
     return decoder_->SetParent(NULL, 0);
 }
 
+bool GpuScheduler::MapExternalResource(
+    resource_type::ResourceType resource_type,
+    uint32 resource_source_id,
+    GpuScheduler* source_scheduler,
+    uint32 resource_dest_id) {
+  return decoder_->MapExternalResource(
+      resource_type,
+      resource_source_id,
+      source_scheduler ? source_scheduler->decoder_.get() : NULL,
+      resource_dest_id);
+}
+
 #if defined(OS_MACOSX)
 namespace {
 const unsigned int kMaxOutstandingSwapBuffersCallsPerOnscreenContext = 1;
 }
 #endif
 
 void GpuScheduler::PutChanged() {
   TRACE_EVENT1("gpu", "GpuScheduler:PutChanged", "this", this);
 
   DCHECK(IsScheduled());
@@ skipping 115 matching lines @@
       parser_(parser),
       unscheduled_count_(0),
 #if defined(OS_MACOSX)
       swap_buffers_count_(0),
       acknowledged_swap_buffers_count_(0),
 #endif
       method_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
 }
 
 }  // namespace gpu