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

Caused a heap-use-after-free in GLES2DecoderManualInitTest.AsyncPixelTransfers
on Linux ASan+LSan Tests (1):
http://build.chromium.org/p/chromium.memory/builders/Linux%20ASan%2BLSan%20Tests%20%281%29/builds/863


> By keeping track of transfer buffer usage (both sync and async), it is
> possible to reuse an existing transfer buffer earlier than it is today.
> 
> For synchronous uploads, this is done by inserting tokens marking a
> buffer's last usage. If such a token has passed, the buffer can be
> reused.
> 
> For asynchronous uploads, this is done by adding an internal async
> upload token to the GLES2Implementation and GLES2CmdDecoderImpl that
> enumerates all asynchronous uploads. When an upload is completed, the
> token is synchronized with the client which then can free the memory
> associated with the async token.
> 
> The fenced allocator and mapped memory manager gets a callback that is
> used to allow fenced allocator to make the user, in this case
> GLES2Implementation, poll the current async upload token and free any
> associated memory.
> 
> BUG=328808
> 
> Review URL: https://codereview.chromium.org/116863003

TBR=jadahl@opera.com

Review URL: https://codereview.chromium.org/216673006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@260193 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 0 insertions, 9 deletions

diff --git a/gpu/command_buffer/client/cmd_buffer_helper.h b/gpu/command_buffer/client/cmd_buffer_helper.h
index a2de5ac..49230b4 100644
--- a/gpu/command_buffer/client/cmd_buffer_helper.h
+++ b/gpu/command_buffer/client/cmd_buffer_helper.h
@@ -84,15 +84,6 @@ class GPU_EXPORT CommandBufferHelper {
   //   shutdown.
   int32 InsertToken();
 
-  // Returns true if the token has passed.
-  // Parameters:
-  //   the value of the token to check whether it has passed
-  bool HasTokenPassed(int32 token) const {
-    if (token > token_)
-      return true;  // we wrapped
-    return last_token_read() >= token;
-  }
-
   // Waits until the token of a particular value has passed through the command
   // stream (i.e. commands inserted before that token have been executed).
   // NOTE: This will call Flush if it needs to block.