Add WebView-specific whitelist for crash keys.

android_webview/common/crash_reporter/crash_keys.h

Index: android_webview/common/crash_reporter/crash_keys.h
diff --git a/android_webview/common/crash_reporter/crash_keys.h b/android_webview/common/crash_reporter/crash_keys.h
index 03b2e2a4051688ae4c7529673c56e6612fadc02d..67b18d0f735819ffda63621445beb5f8d864a94f 100644
--- a/android_webview/common/crash_reporter/crash_keys.h
+++ b/android_webview/common/crash_reporter/crash_keys.h
@@ -7,12 +7,15 @@
 
 #include <stddef.h>
 
+#include "base/debug/crash_logging.h"
+
 namespace android_webview {
 namespace crash_keys {
 
 // Registers all of the potential crash keys that can be sent to the crash
 // reporting server. Returns the size of the union of all keys.
 size_t RegisterWebViewCrashKeys();
+std::vector<base::debug::CrashKey> GetWhiteListedWebViewCrashKeys();
 
 // Crash Key Name Constants ////////////////////////////////////////////////////