Cleanup: LFH only needs to be enabled on XP/2003

chrome/app/chrome_exe_main_win.cc

 // Copyright (c) 2011 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 <windows.h>
 #include <malloc.h>
 #include <shellscalingapi.h>
 #include <stddef.h>
 #include <tchar.h>
 
@@ skipping 112 matching lines @@
   return set_process_dpi_aware_func &&
     set_process_dpi_aware_func();
 }
 
 void EnableHighDPISupport() {
   if (!SetProcessDpiAwarenessWrapper(PROCESS_SYSTEM_DPI_AWARE)) {
     SetProcessDPIAwareWrapper();
   }
 }
 
-void SwitchToLFHeap() {
-  // Only needed on XP but harmless on other Windows flavors.
-  auto crt_heap = _get_heap_handle();
-  ULONG enable_LFH = 2;
-  if (HeapSetInformation(reinterpret_cast<HANDLE>(crt_heap),
-                         HeapCompatibilityInformation,
-                         &enable_LFH, sizeof(enable_LFH))) {
-    VLOG(1) << "Low fragmentation heap enabled.";
-  }
-}
-
 // Returns true if |command_line| contains a /prefetch:# argument where # is in
 // [1, 8].
 bool HasValidWindowsPrefetchArgument(const base::CommandLine& command_line) {
   const base::char16 kPrefetchArgumentPrefix[] = L"/prefetch:";
 
   for (const auto& arg : command_line.argv()) {
     if (arg.size() == arraysize(kPrefetchArgumentPrefix) &&
         base::StartsWith(arg, kPrefetchArgumentPrefix,
                          base::CompareCase::SENSITIVE)) {
       return arg[arraysize(kPrefetchArgumentPrefix) - 1] >= L'1' &&
@@ skipping 44 matching lines @@
 
   if (process_type == crash_reporter::switches::kCrashpadHandler) {
     return crash_reporter::RunAsCrashpadHandler(
         *base::CommandLine::ForCurrentProcess());
   }
 
   crash_reporter::SetCrashReporterClient(g_chrome_crash_client.Pointer());
   crash_reporter::InitializeCrashpadWithEmbeddedHandler(process_type.empty(),
                                                         process_type);
 
-  SwitchToLFHeap();
-
   startup_metric_utils::RecordExeMainEntryPointTime(base::Time::Now());
 
   // Signal Chrome Elf that Chrome has begun to start.
   SignalChromeElf();
 
   // The exit manager is in charge of calling the dtors of singletons.
   base::AtExitManager exit_manager;
 
   // We don't want to set DPI awareness on pre-Win7 because we don't support
   // DirectWrite there. GDI fonts are kerned very badly, so better to leave
   // DPI-unaware and at effective 1.0. See also ShouldUseDirectWrite().
   if (base::win::GetVersion() >= base::win::VERSION_WIN7)
     EnableHighDPISupport();
 
   if (AttemptFastNotify(*command_line))
     return 0;
 
   // Load and launch the chrome dll. *Everything* happens inside.
   VLOG(1) << "About to load main DLL.";
   MainDllLoader* loader = MakeMainDllLoader();
   int rc = loader->Launch(instance);
   loader->RelaunchChromeBrowserWithNewCommandLineIfNeeded();
   delete loader;
   return rc;
 }