Remove unmapped histogram GPU.BlockStatusForClient3DAPIs

content/browser/gpu/gpu_data_manager_impl_private.cc

 // Copyright (c) 2013 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 "content/browser/gpu/gpu_data_manager_impl_private.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 1220 matching lines @@
 
   // Note: adjusting the policies in this code will almost certainly
   // require adjusting the associated unit tests.
   std::string domain = GetDomainFromURL(url);
 
   DomainBlockMap::const_iterator iter = blocked_domains_.find(domain);
   if (iter != blocked_domains_.end()) {
     // Err on the side of caution, and assume that if a particular
     // domain shows up in the block map, it's there for a good
     // reason and don't let its presence there automatically expire.
-
-    UMA_HISTOGRAM_ENUMERATION("GPU.BlockStatusForClient3DAPIs",
-                              BLOCK_STATUS_SPECIFIC_DOMAIN_BLOCKED,
-                              BLOCK_STATUS_MAX);
-
     return GpuDataManagerImpl::DOMAIN_BLOCK_STATUS_BLOCKED;
   }
 
   // Look at the timestamps of the recent GPU resets to see if there are
   // enough within the threshold which would cause us to blacklist all
   // domains. This doesn't need to be overly precise -- if time goes
   // backward due to a system clock adjustment, that's fine.
   //
   // TODO(kbr): make this pay attention to the TDR thresholds in the
   // Windows registry, but make sure it continues to be testable.
@@ skipping 49 matching lines @@
   gpu_info_.context_info_state = gpu::kCollectInfoFatalFailure;
 #if defined(OS_WIN)
   gpu_info_.dx_diagnostics_info_state = gpu::kCollectInfoFatalFailure;
 #endif
   complete_gpu_info_already_requested_ = true;
   // Some observers might be waiting.
   NotifyGpuInfoUpdate();
 }
 
 }  // namespace content