Update Linux to use scoped_refptr<T>::get() rather than implicit "operator T*"

gpu/command_buffer/service/async_pixel_transfer_manager_share_group.cc

Index: gpu/command_buffer/service/async_pixel_transfer_manager_share_group.cc
diff --git a/gpu/command_buffer/service/async_pixel_transfer_manager_share_group.cc b/gpu/command_buffer/service/async_pixel_transfer_manager_share_group.cc
index 5a1931147b4f3a634a6ef09a9125ff67972e0832..bb301a472d699de59440bfcf13263ea997787543 100644
--- a/gpu/command_buffer/service/async_pixel_transfer_manager_share_group.cc
+++ b/gpu/command_buffer/service/async_pixel_transfer_manager_share_group.cc
@@ -216,7 +216,8 @@ class TransferStateInternal
       : texture_id_(texture_id), define_params_(define_params) {}
 
   bool TransferIsInProgress() {
-    return pending_upload_task_ && pending_upload_task_->TaskIsInProgress();
+    return pending_upload_task_.get() &&
+           pending_upload_task_->TaskIsInProgress();
   }
 
   void BindTransfer() {
@@ -231,7 +232,7 @@ class TransferStateInternal
 
   void WaitForTransferCompletion() {
     TRACE_EVENT0("gpu", "WaitForTransferCompletion");
-    DCHECK(pending_upload_task_);
+    DCHECK(pending_upload_task_.get());
     if (!pending_upload_task_->TryRun()) {
       pending_upload_task_->WaitForTask();
     }
@@ -240,7 +241,7 @@ class TransferStateInternal
 
   void CancelUpload() {
     TRACE_EVENT0("gpu", "CancelUpload");
-    if (pending_upload_task_)
+    if (pending_upload_task_.get())
       pending_upload_task_->Cancel();
     pending_upload_task_ = NULL;
   }