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diff --git a/chromium/components/crash/content/browser/crash_metrics_reporter_android.h b/chromium/components/crash/content/browser/crash_metrics_reporter_android.h
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+++ b/chromium/components/crash/content/browser/crash_metrics_reporter_android.h
@@ -0,0 +1,91 @@
+// Copyright 2018 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.
+
+#ifndef COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_METRICS_REPORTER_ANDROID_H_
+#define COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_METRICS_REPORTER_ANDROID_H_
+
+#include "base/containers/flat_set.h"
+#include "base/observer_list_threadsafe.h"
+#include "components/crash/content/browser/child_exit_observer_android.h"
+#include "components/crash/content/browser/crash_dump_manager_android.h"
+
+namespace crash_reporter {
+
+// Reports crash metrics about child processes to UMA, which is used as ground
+// truth for child process stability. This class should be used by any code that
+// wants to observe reason for the death of a child process.
+class CrashMetricsReporter {
+ public:
+  // This enum is used to back a UMA histogram, and must be treated as
+  // append-only.
+  enum ExitStatus {
+    EMPTY_MINIDUMP_WHILE_RUNNING,
+    EMPTY_MINIDUMP_WHILE_PAUSED,
+    EMPTY_MINIDUMP_WHILE_BACKGROUND,
+    VALID_MINIDUMP_WHILE_RUNNING,
+    VALID_MINIDUMP_WHILE_PAUSED,
+    VALID_MINIDUMP_WHILE_BACKGROUND,
+    MINIDUMP_STATUS_COUNT
+  };
+
+  // These values are persisted to logs. Entries should not be renumbered and
+  // numeric values should never be reused.
+  enum class ProcessedCrashCounts {
+    kGpuForegroundOom = 0,
+    kRendererForegroundVisibleOom = 1,
+    kRendererForegroundIntentionalKill = 2,
+    kRendererForegroundVisibleSubframeOom = 3,
+    kRendererForegroundVisibleSubframeIntentionalKill = 4,
+    kRendererForegroundVisibleCrash = 5,
+    kRendererForegroundVisibleSubframeCrash = 6,
+    kGpuCrashAll = 7,
+    kRendererCrashAll = 8,
+    kRendererForegroundVisibleMainFrameIntentionalKill = 9,
+    kRendererForegroundVisibleNormalTermNoMinidump = 10,
+    kRendererForegroundInvisibleWithStrongBindingKilled = 11,
+    kRendererForegroundInvisibleWithStrongBindingOom = 12,
+    kRendererForegroundInvisibleWithModerateBindingKilled = 13,
+    kRendererForegroundInvisibleWithModerateBindingOom = 14,
+    kMaxValue = kRendererForegroundInvisibleWithModerateBindingOom
+  };
+  using ReportedCrashTypeSet = base::flat_set<ProcessedCrashCounts>;
+
+  // Careful note: the CrashMetricsReporter observers are asynchronous, and are
+  // notified via PostTask. This could be problematic with a large number of
+  // observers. Consider using a middle-layer observer to fan out synchronously
+  // to leaf observers if you need many objects listening to these messages.
+  class Observer {
+   public:
+    // Called when child process is dead and minidump was processed.
+    // |reported_counts| is a set of recorded metrics about child process
+    // crashes. It could be empty if no metrics were recorded.
+    virtual void OnCrashDumpProcessed(
+        int rph_id,
+        const ReportedCrashTypeSet& reported_counts) = 0;
+  };
+
+  static CrashMetricsReporter* GetInstance();
+
+  // Can be called on any thread.
+  void AddObserver(Observer* observer);
+  void RemoveObserver(Observer* observer);
+
+  void CrashDumpProcessed(const ChildExitObserver::TerminationInfo& info,
+                          breakpad::CrashDumpManager::CrashDumpStatus status);
+
+ private:
+  CrashMetricsReporter();
+  ~CrashMetricsReporter();
+
+  void NotifyObservers(int rph_id, const ReportedCrashTypeSet& reported_counts);
+
+  scoped_refptr<base::ObserverListThreadSafe<CrashMetricsReporter::Observer>>
+      async_observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(CrashMetricsReporter);
+};
+
+}  // namespace crash_reporter
+
+#endif  // COMPONENTS_CRASH_CONTENT_BROWSER_CRASH_METRICS_REPORTER_ANDROID_H_