convert //gpu to std::unique_ptr

gpu/ipc/service/gpu_channel.cc

Index: gpu/ipc/service/gpu_channel.cc
diff --git a/gpu/ipc/service/gpu_channel.cc b/gpu/ipc/service/gpu_channel.cc
index a7f07ef6ffdc8477949b754e26046df0befcc663..7a56a62805d9262175af3138be8a0daa929067e3 100644
--- a/gpu/ipc/service/gpu_channel.cc
+++ b/gpu/ipc/service/gpu_channel.cc
@@ -194,7 +194,7 @@ bool GpuChannelMessageQueue::PushBackMessage(const IPC::Message& message) {
 
     uint32_t order_num = sync_point_order_data_->GenerateUnprocessedOrderNumber(
         sync_point_manager_);
-    scoped_ptr<GpuChannelMessage> msg(
+    std::unique_ptr<GpuChannelMessage> msg(
         new GpuChannelMessage(message, order_num, base::TimeTicks::Now()));
 
     if (channel_messages_.empty()) {
@@ -958,7 +958,7 @@ void GpuChannel::OnCreateCommandBuffer(
     return;
   }
 
-  scoped_ptr<GpuCommandBufferStub> stub(new GpuCommandBufferStub(
+  std::unique_ptr<GpuCommandBufferStub> stub(new GpuCommandBufferStub(
       this, sync_point_manager_, task_runner_.get(), share_group,
       surface_handle, mailbox_manager_.get(), preempted_flag_.get(),
       subscription_ref_set_.get(), pending_valuebuffer_state_.get(), size,
@@ -983,7 +983,7 @@ void GpuChannel::OnDestroyCommandBuffer(int32_t route_id) {
   TRACE_EVENT1("gpu", "GpuChannel::OnDestroyCommandBuffer",
                "route_id", route_id);
 
-  scoped_ptr<GpuCommandBufferStub> stub = stubs_.take_and_erase(route_id);
+  std::unique_ptr<GpuCommandBufferStub> stub = stubs_.take_and_erase(route_id);
   // In case the renderer is currently blocked waiting for a sync reply from the
   // stub, we need to make sure to reschedule the correct stream here.
   if (stub && !stub->IsScheduled()) {