Do not generate a microdump if there are no webview pointers on the stack.

android_webview/crash_reporter/aw_microdump_crash_reporter.h

 // 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.
 
 #ifndef ANDROID_WEBVIEW_CRASH_REPORTER_AW_MICRODUMP_CRASH_REPORTER_H_
 #define ANDROID_WEBVIEW_CRASH_REPORTER_AW_MICRODUMP_CRASH_REPORTER_H_
 
 #include <string>
 
 namespace android_webview {
 namespace crash_reporter {
 
 void EnableMicrodumpCrashReporter(const std::string& process_type,
                                   int crash_signal_fd);
 void AddGpuFingerprintToMicrodumpCrashHandler(
     const std::string& gpu_fingerprint);
+void SetWebViewTextAddrRange(uintptr_t start, uintptr_t end);
 bool DumpWithoutCrashingToFd(int fd);
 }  // namespace crash_reporter
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_CRASH_REPORTER_AW_MICRODUMP_CRASH_REPORTER_H_