Revert 185146

> Windows: Automatically disable GPU sandbox when DisplayLink is installed.
> 
> BUG=177611
> 
> Review URL: https://chromiumcodereview.appspot.com/12375003

TBR=apatrick@chromium.org
Review URL: https://codereview.chromium.org/12467002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@186234 0039d316-1c4b-4281-b951-d872f2087c98

content/browser/gpu/gpu_data_manager_impl.cc

@@ -4,8 +4,6 @@
 
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 
-#include <set>
-
 #if defined(OS_MACOSX)
 #include <ApplicationServices/ApplicationServices.h>
 #endif  // OS_MACOSX
@@ -16,7 +14,6 @@
 #include "base/file_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
-#include "base/string16.h"
 #include "base/string_piece.h"
 #include "base/stringprintf.h"
 #include "base/sys_info.h"
@@ -39,7 +36,6 @@
 #include "webkit/plugins/plugin_switches.h"
 
 #if defined(OS_WIN)
-#include "base/win/registry.h"
 #include "base/win/windows_version.h"
 #endif
 
@@ -87,46 +83,6 @@ enum BlockStatusHistogram {
   BLOCK_STATUS_MAX
 };
 
-#if defined(OS_WIN)
-bool GetInstalledProgramDisplayNames(std::set<string16>* display_names) {
-  base::win::RegKey key;
-
-  if (FAILED(key.Open(
-      HKEY_LOCAL_MACHINE, L"SOFTWARE", KEY_READ | KEY_WOW64_64KEY))) {
-    return false;
-  }
-
-  if (FAILED(key.OpenKey(L"Microsoft", KEY_READ | KEY_WOW64_64KEY)))
-    return false;
-
-  if (FAILED(key.OpenKey(L"Windows", KEY_READ | KEY_WOW64_64KEY)))
-    return false;
-
-  if (FAILED(key.OpenKey(L"CurrentVersion", KEY_READ | KEY_WOW64_64KEY)))
-    return false;
-
-  if (FAILED(key.OpenKey(L"Uninstall", KEY_READ | KEY_WOW64_64KEY)))
-    return false;
-
-  for (base::win::RegistryKeyIterator key_it(key.Handle(), NULL);
-       key_it.Valid();
-       ++key_it) {
-    base::win::RegKey sub_key;
-    if (FAILED(sub_key.Open(
-        key.Handle(), key_it.Name(), KEY_READ | KEY_WOW64_64KEY))) {
-      continue;
-    }
-
-    string16 display_name;
-    if (FAILED(sub_key.ReadValue(L"DisplayName", &display_name)))
-      continue;
-
-    display_names->insert(display_name);
-  }
-
-  return true;
-}
-#endif
 }  // namespace anonymous
 
 // static
@@ -480,17 +436,6 @@ void GpuDataManagerImpl::AppendGpuCommandLine(
     command_line->AppendSwitchPath(switches::kSwiftShaderPath,
                                    swiftshader_path);
 
-#if defined(OS_WIN)
-  // DisplayLink drivers cause a hang when running in the GPU process sandbox.
-  std::set<string16> installed_display_names;
-  if (GetInstalledProgramDisplayNames(&installed_display_names)) {
-    if (installed_display_names.find(L"DisplayLink Core Software") !=
-        installed_display_names.end()) {
-      command_line->AppendSwitch(switches::kReduceGpuSandbox);
-    }
-  }
-#endif
-
   {
     base::AutoLock auto_lock(gpu_info_lock_);
     if (gpu_info_.optimus)