Add histogram entry for GpuVideoDecoder errors.

content/renderer/pepper/pepper_video_decoder_host.cc

 // Copyright (c) 2014 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/renderer/pepper/pepper_video_decoder_host.h"
 
 #include <stddef.h>
 
 #include "base/bind.h"
 #include "base/memory/shared_memory.h"
@@ skipping 412 matching lines @@
 void PepperVideoDecoderHost::NotifyError(
     media::VideoDecodeAccelerator::Error error) {
   int32_t pp_error = PP_ERROR_FAILED;
   switch (error) {
     case media::VideoDecodeAccelerator::UNREADABLE_INPUT:
       pp_error = PP_ERROR_MALFORMED_INPUT;
       break;
     case media::VideoDecodeAccelerator::ILLEGAL_STATE:
     case media::VideoDecodeAccelerator::INVALID_ARGUMENT:
     case media::VideoDecodeAccelerator::PLATFORM_FAILURE:
-    case media::VideoDecodeAccelerator::LARGEST_ERROR_ENUM:
       pp_error = PP_ERROR_RESOURCE_FAILED;
       break;
     // No default case, to catch unhandled enum values.
   }
 
   // Try to initialize software decoder and use it instead.
   if (!software_fallback_used_ && software_fallback_allowed_) {
     VLOG(0)
         << "Hardware decoder has returned an error. Trying Software decoder.";
     if (TryFallbackToSoftwareDecoder())
@@ skipping 86 matching lines @@
 
 PepperVideoDecoderHost::PendingDecodeList::iterator
 PepperVideoDecoderHost::GetPendingDecodeById(int32_t decode_id) {
   return std::find_if(pending_decodes_.begin(), pending_decodes_.end(),
                       [decode_id](const PendingDecode& item) {
                         return item.decode_id == decode_id;
                       });
 }
 
 }  // namespace content