Add Link-Time Optimizations support for Android.

build/android/disable_lto.gypi

Index: build/android/disable_lto.gypi
diff --git a/build/android/disable_lto.gypi b/build/android/disable_lto.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..448945ce08c8f60d610dcb63c40218f647eef965
--- /dev/null
+++ b/build/android/disable_lto.gypi
@@ -0,0 +1,20 @@
+# Copyright (c) 2014 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.
+
+# This file is meant to be included to disable LTO on a target.
+
+{
+  'target_conditions': [

[no sievers, 2014/10/10 18:57:32]

should this also check for os == android?

[Fabrice (no longer in Chrome), 2014/10/13 15:45:12]

use_lto should not be used with anything other than android for now. If some
other folks want to test it on other platforms, we'll discuss merging.

+    ['_toolset=="target"', {
+      'conditions': [
+        ['use_lto==1 or use_lto_o2==1', {
+          'cflags!': [
+            '-flto',
+            '-ffat-lto-objects',
+          ],
+        }],
+      ],
+    }],
+  ],
+}