Deprecate memory coordinator v0 related histograms

content/browser/memory/memory_monitor_android.cc

 // Copyright 2016 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.
 
 #include "content/browser/memory/memory_monitor_android.h"
 
 #include "base/android/context_utils.h"
 #include "base/android/jni_android.h"
 #include "base/memory/ptr_util.h"
-#include "base/metrics/histogram_macros.h"
 #include "content/browser/memory/memory_coordinator_impl.h"
 #include "jni/MemoryMonitorAndroid_jni.h"
 
 namespace content {
 
 namespace {
 
 const size_t kMBShift = 20;
 
 void RegisterComponentCallbacks() {
@@ skipping 48 matching lines @@
 const int kTrimMemoryRunningLow = 10;
 const int kTrimMemoryRunningCritical = 15;
 
 // Called by JNI.
 static void OnTrimMemory(JNIEnv* env,
                          const base::android::JavaParamRef<jclass>& jcaller,
                          jint level) {
   DCHECK(level >= 0 && level <= kTrimMemoryLevelMax);
   auto* coordinator = MemoryCoordinatorImpl::GetInstance();
 
-  auto state = coordinator->GetGlobalMemoryState();
-  switch (state) {
-    case base::MemoryState::NORMAL:
-      UMA_HISTOGRAM_ENUMERATION("Memory.Coordinator.TrimMemoryLevel.Normal",
-                                level, kTrimMemoryLevelMax);
-      break;
-    case base::MemoryState::THROTTLED:
-      UMA_HISTOGRAM_ENUMERATION("Memory.Coordinator.TrimMemoryLevel.Throttled",
-                                level, kTrimMemoryLevelMax);
-      break;
-    case base::MemoryState::SUSPENDED:
-      UMA_HISTOGRAM_ENUMERATION("Memory.Coordinator.TrimMemoryLevel.Suspended",
-                                level, kTrimMemoryLevelMax);
-      break;
-    case base::MemoryState::UNKNOWN:
-      NOTREACHED();
-      break;
-  }
-
   if (level >= kTrimMemoryRunningCritical) {
     coordinator->ForceSetGlobalState(base::MemoryState::SUSPENDED,
                                      base::TimeDelta::FromMinutes(1));
   } else if (level >= kTrimMemoryRunningLow) {
     coordinator->ForceSetGlobalState(base::MemoryState::THROTTLED,
                                      base::TimeDelta::FromMinutes(1));
   }
 }
 
 // static
@@ skipping 24 matching lines @@
 void MemoryMonitorAndroid::GetMemoryInfo(MemoryInfo* out) {
   delegate_->GetMemoryInfo(out);
 }
 
 // Implementation of a factory function defined in memory_monitor.h.
 std::unique_ptr<MemoryMonitor> CreateMemoryMonitor() {
   return MemoryMonitorAndroid::Create();
 }
 
 }  // namespace content