Remove <(webrtc_root) from source file entries.

This required to move the AGC tools source files
into webrtc/tools and create a new agc_test_utils target.

Since audio_codec_speed_tests.gypi referenced sources above,
the best approach I could come up with was to add an audio_coding.gypi
file at a higher level and move the targets in there (+ the includes from
modules.gyp which is an improvement IMO).

I also added a PRESUBMIT.py check to prevent new source
entries being added with <(webrtc_root) in the path.

BUG=4185
R=andrew@webrtc.org, tina.legrand@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/37859004

Cr-Commit-Position: refs/heads/master@{#8197}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8197 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_coding/audio_codec_speed_tests.isolate

@@ -0,0 +1,33 @@
+# Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+{
+  'conditions': [
+    ['OS=="linux" or OS=="mac" or OS=="win" or OS=="android"', {
+      'variables': {
+        'files': [
+          '<(DEPTH)/resources/audio_coding/music_stereo_48kHz.pcm',
+          '<(DEPTH)/resources/audio_coding/speech_mono_16kHz.pcm',
+          '<(DEPTH)/resources/audio_coding/speech_mono_32_48kHz.pcm',
+        ],
+      },
+    }],
+    ['OS=="linux" or OS=="mac" or OS=="win"', {
+      'variables': {
+        'command': [
+          '<(DEPTH)/testing/test_env.py',
+          '<(PRODUCT_DIR)/audio_codec_speed_tests<(EXECUTABLE_SUFFIX)',
+        ],
+        'files': [
+          '<(DEPTH)/DEPS',
+          '<(DEPTH)/testing/test_env.py',
+          '<(PRODUCT_DIR)/audio_codec_speed_tests<(EXECUTABLE_SUFFIX)',
+        ],
+      },
+    }],
+  ],
+}