Fix feature identity in Android tests

This CL fixes media_unittests in a component build.
The issue was a duplicate global feature object since media_switches.cc
is inside a source set.

Bug: 1123898
Change-Id: I97f18f166af4da4924ec191de6c183426e942aec
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2387578Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Sergey Abbakumov <sabbakumov@yandex-team.ru>
Cr-Commit-Position: refs/heads/master@{#804143}

media/capabilities/video_decode_stats_db_impl.cc

@@ -115,6 +115,17 @@ bool VideoDecodeStatsDBImpl::GetEnableUnweightedEntries() {
       kEnableUnweightedEntriesDefault);
 }
 
+// static
+base::FieldTrialParams VideoDecodeStatsDBImpl::GetFieldTrialParams() {
+  base::FieldTrialParams actual_trial_params;
+
+  const bool result = base::GetFieldTrialParamsByFeature(
+      kMediaCapabilitiesWithParameters, &actual_trial_params);
+  DCHECK(result);
+
+  return actual_trial_params;
+}
+
 // static
 std::unique_ptr<VideoDecodeStatsDBImpl> VideoDecodeStatsDBImpl::Create(
     base::FilePath db_dir,

media/capabilities/video_decode_stats_db_impl.h

@@ -11,6 +11,7 @@
 #include "base/containers/flat_map.h"
 #include "base/files/file_path.h"
 #include "base/memory/weak_ptr.h"
+#include "base/metrics/field_trial_params.h"
 #include "components/leveldb_proto/public/proto_database.h"
 #include "media/base/media_export.h"
 #include "media/base/video_codecs.h"
@@ -86,6 +87,9 @@ class MEDIA_EXPORT VideoDecodeStatsDBImpl : public VideoDecodeStatsDB {
   // regardless of how many frames were decoded.
   static bool GetEnableUnweightedEntries();
 
+  // Returns current feature params.
+  static base::FieldTrialParams GetFieldTrialParams();
+
   // Creates a PendingOperation using |uma_str| and adds it to |pending_ops_|
   // map. Returns PendingOpId for newly started operation. Callers must later
   // call CompletePendingOp() with this id to destroy the PendingOperation and

media/capabilities/video_decode_stats_db_impl_unittest.cc

@@ -91,6 +91,10 @@ class VideoDecodeStatsDBImplTest : public ::testing::Test {
     return VideoDecodeStatsDBImpl::GetEnableUnweightedEntries();
   }
 
+  static base::FieldTrialParams GetFieldTrialParams() {
+    return VideoDecodeStatsDBImpl::GetFieldTrialParams();
+  }
+
   void SetDBClock(base::Clock* clock) {
     stats_db_->set_wall_clock_for_test(clock);
   }
@@ -273,10 +277,7 @@ TEST_F(VideoDecodeStatsDBImplTest, ConfigureMaxFramesPerBuffer) {
   scoped_feature_list.InitAndEnableFeatureWithParameters(
       media::kMediaCapabilitiesWithParameters, params);
 
-  base::FieldTrialParams actual_params;
-  EXPECT_TRUE(base::GetFieldTrialParamsByFeature(
-      media::kMediaCapabilitiesWithParameters, &actual_params));
-  EXPECT_EQ(params, actual_params);
+  EXPECT_EQ(GetFieldTrialParams(), params);
 
   EXPECT_EQ(new_max_frames_per_buffer, GetMaxFramesPerBuffer());
 
@@ -314,10 +315,7 @@ TEST_F(VideoDecodeStatsDBImplTest, ConfigureExpireDays) {
   scoped_feature_list.InitAndEnableFeatureWithParameters(
       media::kMediaCapabilitiesWithParameters, params);
 
-  base::FieldTrialParams actual_params;
-  EXPECT_TRUE(base::GetFieldTrialParamsByFeature(
-      media::kMediaCapabilitiesWithParameters, &actual_params));
-  EXPECT_EQ(params, actual_params);
+  EXPECT_EQ(GetFieldTrialParams(), params);
 
   EXPECT_EQ(new_max_days_to_keep_stats, GetMaxDaysToKeepStats());
 
@@ -638,10 +636,7 @@ TEST_F(VideoDecodeStatsDBImplTest, EnableUnweightedEntries) {
   scoped_feature_list.InitAndEnableFeatureWithParameters(
       media::kMediaCapabilitiesWithParameters, params);
 
-  base::FieldTrialParams actual_params;
-  EXPECT_TRUE(base::GetFieldTrialParamsByFeature(
-      media::kMediaCapabilitiesWithParameters, &actual_params));
-  EXPECT_EQ(params, actual_params);
+  EXPECT_EQ(GetFieldTrialParams(), params);
 
   // Confirm field trial overridden.
   EXPECT_TRUE(GetMaxDaysToKeepStats());

media/mojo/services/video_decode_perf_history.cc

@@ -54,6 +54,17 @@ double VideoDecodePerfHistory::GetMaxSmoothDroppedFramesPercent(bool is_eme) {
   return threshold;
 }
 
+// static
+base::FieldTrialParams VideoDecodePerfHistory::GetFieldTrialParams() {
+  base::FieldTrialParams actual_trial_params;
+
+  const bool result = base::GetFieldTrialParamsByFeature(
+      kMediaCapabilitiesWithParameters, &actual_trial_params);
+  DCHECK(result);
+
+  return actual_trial_params;
+}
+
 VideoDecodePerfHistory::VideoDecodePerfHistory(
     std::unique_ptr<VideoDecodeStatsDB> db,
     learning::FeatureProviderFactoryCB feature_factory_cb)

media/mojo/services/video_decode_perf_history.h

@@ -11,6 +11,7 @@
 #include <string>
 
 #include "base/callback.h"
+#include "base/metrics/field_trial_params.h"
 #include "base/sequence_checker.h"
 #include "base/supports_user_data.h"
 #include "media/base/video_codecs.h"
@@ -100,6 +101,9 @@ class MEDIA_MOJO_EXPORT VideoDecodePerfHistory
   // of dropped frames is less-than-or-equal-to this value.
   static double GetMaxSmoothDroppedFramesPercent(bool is_eme);
 
+  // Returns current feature params.
+  static base::FieldTrialParams GetFieldTrialParams();
+
   // Track the status of database lazy initialization.
   enum InitStatus {
     UNINITIALIZED,

media/mojo/services/video_decode_perf_history_unittest.cc

@@ -172,6 +172,10 @@ class VideoDecodePerfHistoryTest : public testing::Test {
     return VideoDecodePerfHistory::GetMaxSmoothDroppedFramesPercent(is_eme);
   }
 
+  static base::FieldTrialParams GetFieldTrialParams() {
+    return VideoDecodePerfHistory::GetFieldTrialParams();
+  }
+
   // Tests may set this as the callback for VideoDecodePerfHistory::GetPerfInfo
   // to check the results of the call.
   MOCK_METHOD2(MockGetPerfInfoCB,
@@ -822,10 +826,7 @@ TEST_P(VideoDecodePerfHistoryParamTest,
   scoped_feature_list.InitAndEnableFeatureWithParameters(
       media::kMediaCapabilitiesWithParameters, trial_params);
 
-  base::FieldTrialParams actual_trial_params;
-  EXPECT_TRUE(base::GetFieldTrialParamsByFeature(
-      media::kMediaCapabilitiesWithParameters, &actual_trial_params));
-  EXPECT_EQ(trial_params, actual_trial_params);
+  EXPECT_EQ(GetFieldTrialParams(), trial_params);
 
   // Non EME threshold is overridden.
   EXPECT_EQ(new_smooth_dropped_frames_threshold,
@@ -940,10 +941,7 @@ TEST_P(VideoDecodePerfHistoryParamTest,
   scoped_feature_list.InitAndEnableFeatureWithParameters(
       media::kMediaCapabilitiesWithParameters, trial_params);
 
-  base::FieldTrialParams actual_trial_params;
-  EXPECT_TRUE(base::GetFieldTrialParamsByFeature(
-      media::kMediaCapabilitiesWithParameters, &actual_trial_params));
-  EXPECT_EQ(trial_params, actual_trial_params);
+  EXPECT_EQ(GetFieldTrialParams(), trial_params);
 
   // Both thresholds should be overridden.
   EXPECT_EQ(new_CLEAR_smooth_dropped_frames_threshold,