[windows] Make most file_win.cc functions use malloc for string conversions.

build/config/compiler/BUILD.gn

 # 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.
 
 import("//build/config/android/config.gni")
 if (current_cpu == "arm") {
   import("//build/config/arm.gni")
 }
 if (current_cpu == "mipsel" || current_cpu == "mips64el") {
   import("//build/config/mips.gni")
@@ skipping 714 matching lines @@
     cflags = [ "-Os" ] + common_optimize_on_cflags  # Favor size over speed.
   } else {
     cflags = [ "-O3" ] + common_optimize_on_cflags
   }
   ldflags = common_optimize_on_ldflags
 }
 
 # Turn off optimizations.
 config("no_optimize") {
   if (is_win) {
+    # The only difference on windows is that the inlining is less aggressive.
+    # (We accept the default level). Otherwise it is very slow.
     cflags = [
       "/O2",  # Do some optimizations.
       "/Oy-",  # Disable omitting frame pointers, must be after /O2.
-      "/Ob0",  # Disable all inlining (on by default).
     ]
   } else if (is_android) {
     # On Android we kind of optimize some things that don't affect debugging
     # much even when optimization is disabled to get the binary size down.
     cflags = [
       "-Os",
       "-fdata-sections",
       "-ffunction-sections",
     ]
     ldflags = common_optimize_on_ldflags
@@ skipping 17 matching lines @@
       cflags = [ "/Zi" ]  # Produce PDB file, no edit and continue.
     }
     ldflags = [ "/DEBUG" ]
   } else {
     cflags = [
       "-g3",
       "-ggdb3",
     ]
   }
 }