Revert "Add aliased variables for GPU failure browser crashes."

This reverts commit 718282e6.

Reason for revert: Added for debugging purposes and no longer needed.

Original change's description:
> Add aliased variables for GPU failure browser crashes.
> 
> This CL saves some state in local variables and aliases them for
> inclusion in crash minidumps. This information will help diagnose GPU
> process failures with OOP-D and the resulting browser crash when we
> can't launch a GPU process.
> 
> Bug: 849639
> Change-Id: Id5a65c428eff83c80208b53081083d4feaf26063
> Reviewed-on: https://chromium-review.googlesource.com/1138178
> Reviewed-by: Jonathan Backer <backer@chromium.org>
> Commit-Queue: kylechar <kylechar@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#575294}

TBR=backer@chromium.org,kylechar@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 849639
Change-Id: I09f1e28b6ccad89bde6a38139787a3e218d01d62
Reviewed-on: https://chromium-review.googlesource.com/1206697Reviewed-by: Jonathan Backer <backer@chromium.org>
Reviewed-by: kylechar <kylechar@chromium.org>
Commit-Queue: kylechar <kylechar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588925}

content/browser/gpu/gpu_process_host.cc

@@ -15,7 +15,6 @@
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/command_line.h"
-#include "base/debug/alias.h"
 #include "base/feature_list.h"
 #include "base/logging.h"
 #include "base/macros.h"
@@ -983,11 +982,6 @@ void GpuProcessHost::OnProcessLaunched() {
 }
 
 void GpuProcessHost::OnProcessLaunchFailed(int error_code) {
-  // TODO(crbug.com/849639): Ensure |error_code| is included in crash minidumps.
-  // This is for debugging and should be removed when bug is closed.
-  int process_launch_error_code = error_code;
-  base::debug::Alias(&process_launch_error_code);
-
 #if defined(OS_WIN)
   if (kind_ == GPU_PROCESS_KIND_SANDBOXED)
     RecordAppContainerStatus(error_code, crashed_before_);
@@ -996,11 +990,6 @@ void GpuProcessHost::OnProcessLaunchFailed(int error_code) {
 }
 
 void GpuProcessHost::OnProcessCrashed(int exit_code) {
-  // TODO(crbug.com/849639): Ensure |exit_code| is included in crash minidumps.
-  // This is for debugging and should be removed when bug is closed.
-  int process_crash_exit_code = exit_code;
-  base::debug::Alias(&process_crash_exit_code);
-
   // Record crash before doing anything that could start a new GPU process.
   RecordProcessCrash();
 
@@ -1268,16 +1257,6 @@ void GpuProcessHost::RecordProcessCrash() {
     recent_crash_count = display_compositor_recent_crash_count_;
   }
 
-  // TODO(crbug.com/849639): Ensure crash counts are included in crash
-  // minidumps. This is for debugging and should be removed when bug is closed.
-  int hardware_accelerated_crash_count =
-      hardware_accelerated_recent_crash_count_;
-  base::debug::Alias(&hardware_accelerated_crash_count);
-  int swiftshader_crash_count = swiftshader_recent_crash_count_;
-  base::debug::Alias(&swiftshader_crash_count);
-  int display_compositor_crash_count = display_compositor_recent_crash_count_;
-  base::debug::Alias(&display_compositor_crash_count);
-
   // GPU process initialization failed and fallback already happened.
   if (!gpu_host_ || !gpu_host_->initialized())
     return;