Merge changes I7bbf776e,I1b827825

am: fe8b4a6579

* commit 'fe8b4a657979b49e1701bd92f6d5814a99e0b2be': (7237 commits)
  WIP: Changes after merge commit 'cb3f9bd'
  Make the nonlinear beamformer steerable
  Utilize bitrate above codec max to protect video.
  Enable VP9 internal resize by default.
  Filter overlapping RTP header extensions.
  Make VCMEncodedFrameCallback const.
  MediaCodecVideoEncoder: Add number of quality resolution downscales to Encoded callback.
  Remove redudant encoder rate calls.
  Create isolate files for nonparallel tests.
  Register header extensions in RtpRtcpObserver to avoid log spam.
  Make an enum class out of NetEqDecoder, and hide the neteq_decoders_ table
  ACM: Move NACK functionality inside NetEq
  Fix chromium-style warnings in webrtc/sound/.
  Create a 'webrtc_nonparallel_tests' target.
  Update scalability structure data according to updates in the RTP payload profile.
  audio_coding: rename interface -> include
  Rewrote perform_action_on_all_files to be parallell.
  Update reference indices according to updates in the RTP payload profile.
  Disable P2PTransport...TestFailoverControlledSide on Memcheck
  pass clangcl compile options to ignore warnings in gflags.cc
  ...

1 files changed, 62 insertions, 0 deletions

diff --git a/webrtc/system_wrappers/source/field_trial_default.cc b/webrtc/system_wrappers/source/field_trial_default.cc
new file mode 100644
index 0000000000..1a9bd6bc79
--- /dev/null
+++ b/webrtc/system_wrappers/source/field_trial_default.cc
@@ -0,0 +1,62 @@
+// 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.
+//
+
+#include "webrtc/system_wrappers/include/field_trial.h"
+#include "webrtc/system_wrappers/include/field_trial_default.h"
+
+#include <string>
+
+// Simple field trial implementation, which allows client to
+// specify desired flags in InitFieldTrialsFromString.
+namespace webrtc {
+namespace field_trial {
+
+static const char *trials_init_string = NULL;
+
+std::string FindFullName(const std::string& name) {
+  if (trials_init_string == NULL)
+    return std::string();
+
+  std::string trials_string(trials_init_string);
+  if (trials_string.empty())
+    return std::string();
+
+  static const char kPersistentStringSeparator = '/';
+  size_t next_item = 0;
+  while (next_item < trials_string.length()) {
+
+    // Find next name/value pair in field trial configuration string.
+    size_t field_name_end = trials_string.find(
+        kPersistentStringSeparator, next_item);
+    if (field_name_end == trials_string.npos || field_name_end == next_item)
+      break;
+    size_t field_value_end = trials_string.find(
+        kPersistentStringSeparator, field_name_end + 1);
+    if (field_value_end == trials_string.npos ||
+        field_value_end == field_name_end + 1)
+      break;
+    std::string field_name(trials_string, next_item,
+        field_name_end - next_item);
+    std::string field_value(trials_string, field_name_end + 1,
+        field_value_end - field_name_end - 1);
+    next_item = field_value_end + 1;
+
+    if (name == field_name)
+      return field_value;
+  }
+  return std::string();
+}
+
+// Optionally initialize field trial from a string.
+void InitFieldTrialsFromString(const char* trials_string) {
+  trials_init_string = trials_string;
+}
+
+}  // namespace field_trial
+}  // namespace webrtc