Revert 260177 "By keeping track of transfer buffer usage (both s..."

trunk/src/gpu/command_buffer/service/async_pixel_transfer_manager_idle.cc

Index: trunk/src/gpu/command_buffer/service/async_pixel_transfer_manager_idle.cc
===================================================================
--- trunk/src/gpu/command_buffer/service/async_pixel_transfer_manager_idle.cc	(revision 260192)
+++ trunk/src/gpu/command_buffer/service/async_pixel_transfer_manager_idle.cc	(working copy)
@@ -89,7 +89,6 @@
 
   shared_state_->tasks.push_back(AsyncPixelTransferManagerIdle::Task(
       id_,
-      this,
       base::Bind(&AsyncPixelTransferDelegateIdle::PerformAsyncTexImage2D,
                  AsWeakPtr(),
                  tex_params,
@@ -107,7 +106,6 @@
 
   shared_state_->tasks.push_back(AsyncPixelTransferManagerIdle::Task(
       id_,
-      this,
       base::Bind(&AsyncPixelTransferDelegateIdle::PerformAsyncTexSubImage2D,
                  AsWeakPtr(),
                  tex_params,
@@ -226,11 +224,8 @@
 }
 
 AsyncPixelTransferManagerIdle::Task::Task(
-    uint64 transfer_id,
-    AsyncPixelTransferDelegate* delegate,
-    const base::Closure& task)
+    uint64 transfer_id, const base::Closure& task)
     : transfer_id(transfer_id),
-      delegate(delegate),
       task(task) {
 }
 
@@ -272,7 +267,6 @@
 
   shared_state_.tasks.push_back(
       Task(0,  // 0 transfer_id for notification tasks.
-           NULL,
            base::Bind(
                &PerformNotifyCompletion,
                mem_params,
@@ -303,15 +297,6 @@
   return !shared_state_.tasks.empty();
 }
 
-void AsyncPixelTransferManagerIdle::WaitAllAsyncTexImage2D() {
-  if (shared_state_.tasks.empty())
-    return;
-
-  const Task& task = shared_state_.tasks.back();
-  if (task.delegate)
-    task.delegate->WaitForTransferCompletion();
-}
-
 AsyncPixelTransferDelegate*
 AsyncPixelTransferManagerIdle::CreatePixelTransferDelegateImpl(
     gles2::TextureRef* ref,