Update to Chromium //base at Chromium commit e3a753f17bac62738b0dbf0b36510f767b081e4b.

allocator/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/allocator.gni")
 
 declare_args() {
   # Provide a way to force disable debugallocation in Debug builds,
   # e.g. for profiling (it's more rare to profile Debug builds,
   # but people sometimes need to do that).
@@ skipping 43 matching lines @@
   import("//build/config/win/visual_studio_version.gni")
 
   config("nocmt") {
     ldflags = [
       "/NODEFAULTLIB:libcmt",
       "/NODEFAULTLIB:libcmtd",
     ]
     libs = [ rebase_path("$target_gen_dir/allocator/libcmt.lib") ]
   }
 
-  action("prep_libc") {
-    script = "prep_libc.py"
-    outputs = [
-      "$target_gen_dir/allocator/libcmt.lib",
-    ]
-    args = [
-      visual_studio_path + "/vc/lib",
-      rebase_path("$target_gen_dir/allocator"),
-      current_cpu,
-    ]
-  }
+  if (!is_component_build) {
+    action("prep_libc") {
+      script = "prep_libc.py"
+      outputs = [
+        "$target_gen_dir/allocator/libcmt.lib",
+      ]
+      args = [
+        visual_studio_path + "/vc/lib",
+        rebase_path("$target_gen_dir/allocator"),
+        current_cpu,
+      ]
+    }
 
-  source_set("allocator_shim") {
-    sources = [
-      "allocator_shim_win.cc",
-    ]
-    configs -= [ "//build/config/compiler:chromium_code" ]
-    configs += [ "//build/config/compiler:no_chromium_code" ]
+    source_set("allocator_shim") {
+      sources = [
+        "allocator_shim_win.cc",
+      ]
+      configs -= [ "//build/config/compiler:chromium_code" ]
+      configs += [ "//build/config/compiler:no_chromium_code" ]
 
-    public_configs = [ ":nocmt" ]
-    deps = [
-      ":prep_libc",
-    ]
+      public_configs = [ ":nocmt" ]
+      deps = [
+        ":prep_libc",
+      ]
+    }
   }
 }
 
 if (use_allocator == "tcmalloc") {
   # tcmalloc currently won't compile on Android.
   source_set("tcmalloc") {
     tcmalloc_dir = "//third_party/tcmalloc/chromium"
 
     # Don't check tcmalloc's includes. These files include various files like
     # base/foo.h and they actually refer to tcmalloc's forked copy of base
@@ skipping 206 matching lines @@
   visibility = [ "//base/*" ]
   sources = [
     "allocator_extension_thunks.cc",
     "allocator_extension_thunks.h",
   ]
   if (is_android && !is_debug) {
     configs -= [ "//build/config/compiler:optimize" ]
     configs += [ "//build/config/compiler:optimize_max" ]
   }
 }