Android: fix cpu_features for WebView build.

build/android/cpufeatures.gypi

Index: build/android/cpufeatures.gypi
diff --git a/build/android/cpufeatures.gypi b/build/android/cpufeatures.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..17b262c977cc9bb8dad59c403600eeae8db0304b
--- /dev/null
+++ b/build/android/cpufeatures.gypi
@@ -0,0 +1,20 @@
+# Copyright (c) 2012 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.
+
+# Depend on the Android NDK's cpu feature detection. The WebView build is part
+# of the system and the library already exists; for the normal build there is a
+# gyp file in the checked-in NDK to build it.
+{
+  'conditions': [
+    ['android_build_type != 0', {
+      'libraries': [
+        'cpufeatures.a'
+      ],
+    }, {
+      'dependencies': [
+        '<(android_ndk_root)/android_tools_ndk.gyp:cpu_features',
+      ],
+    }],

[joth, 2012/11/21 17:43:20]

just to check - neither these set the include path. Do we get cpufeatures.h "for
free" from whatever NDK include path we happen to be using? If so there could be
a version mismatch between that, and the system built version of the static lib.
(?)

[wjia(left Chromium), 2012/11/21 18:39:40]

For branch using '<(android_ndk_root)/android_tools_ndk.gyp:cpu_features', the
path to third_party/android_tools/ndk/sources/android/cpufeatures/cpufeatures.h
has been included in include path. And it uses
third_party/android_tools/ndk/sources/android/cpufeatures/cpufeatures.c to make
libcpu_features.a. refer to
http://git.chromium.org/gitweb/?p=android_tools.git;a=blob_plain;f=ndk/androi...
.

Please let me know if this could be a problem.

+  ],
+}