[android-webview] Enable breakpad microdump crash reporting

android_webview/crash_reporter/aw_microdump_crash_reporter.cc

Index: android_webview/crash_reporter/aw_microdump_crash_reporter.cc
diff --git a/android_webview/crash_reporter/aw_microdump_crash_reporter.cc b/android_webview/crash_reporter/aw_microdump_crash_reporter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..490cd9b7de7df929be54e441b5d5d16d774c861b
--- /dev/null
+++ b/android_webview/crash_reporter/aw_microdump_crash_reporter.cc
@@ -0,0 +1,54 @@
+// Copyright 2015 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 "android_webview/crash_reporter/aw_microdump_crash_reporter.h"
+
+#include "base/lazy_instance.h"
+#include "components/crash/app/breakpad_linux.h"
+#include "components/crash/app/crash_reporter_client.h"
+
+namespace android_webview {
+namespace crash_reporter {
+
+namespace {
+
+class AwCrashReporterClient : public ::crash_reporter::CrashReporterClient {
+ public:
+  AwCrashReporterClient() {}
+
+  // crash_reporter::CrashReporterClient implementation.
+  bool IsRunningUnattended() override { return false; }
+  bool GetCollectStatsConsent() override { return false; }
+
+  // Microdumps are always enabled in WebView builds, conversely to what happens
+  // in the case of the other Chrome for Android builds (where they are enabled
+  // only when NO_UNWIND_TABLES == 1).
+  bool ShouldEnableBreakpadMicrodumps() override { return true; }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AwCrashReporterClient);
+};
+
+base::LazyInstance<AwCrashReporterClient>::Leaky g_crash_reporter_client =
+    LAZY_INSTANCE_INITIALIZER;
+
+bool g_enabled = false;
+
+}  // namespace
+
+void EnableMicrodumpCrashReporter() {
+  if (g_enabled) {
+    NOTREACHED() << "EnableMicrodumpCrashReporter called more than once";
+    return;
+  }
+
+  ::crash_reporter::SetCrashReporterClient(g_crash_reporter_client.Pointer());
+
+  // |process_type| is not really relevant here, as long as it not empty.
+  breakpad::InitNonBrowserCrashReporterForAndroid("webview" /* process_type */);
+  g_enabled = true;
+}
+
+}  // namespace crash_reporter
+}  // namespace android_webview