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

android_webview/crash_reporter/aw_microdump_crash_reporter.cc

 // 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 "android_webview/common/aw_version_info_values.h"
 #include "base/android/build_info.h"
 #include "base/debug/dump_without_crashing.h"
 #include "base/files/file_path.h"
@@ skipping 136 matching lines @@
 
   breakpad::InitMicrodumpCrashHandlerIfNecessary(process_type);
   g_enabled = true;
 }
 
 void AddGpuFingerprintToMicrodumpCrashHandler(
     const std::string& gpu_fingerprint) {
   breakpad::AddGpuFingerprintToMicrodumpCrashHandler(gpu_fingerprint);
 }
 
+void SetWebViewTextAddrRange(uintptr_t start, uintptr_t end) {
+  breakpad::SetWebViewTextAddrRange(start, end);
+}
+
 bool DumpWithoutCrashingToFd(int fd) {
   return g_crash_reporter_client.Pointer()->DumpWithoutCrashingToFd(fd);
 }
 
 }  // namespace crash_reporter
 }  // namespace android_webview