Add WebView-specific whitelist for crash keys.

components/crash/content/app/crash_reporter_client.h

Index: components/crash/content/app/crash_reporter_client.h
diff --git a/components/crash/content/app/crash_reporter_client.h b/components/crash/content/app/crash_reporter_client.h
index 513727c08f3f434365e4df6d12ec8bf482104b95..f0a55e8a397a7048f3efe9ff49bc6361a9b65952 100644
--- a/components/crash/content/app/crash_reporter_client.h
+++ b/components/crash/content/app/crash_reporter_client.h
@@ -144,6 +144,11 @@ class CrashReporterClient {
   // reporting server. Returns the size of the union of all keys.
   virtual size_t RegisterCrashKeys();
 
+  virtual bool UseCrashKeysWhiteList();
+
+  // Returns a NULL-terminated array of crash keys to whitelist.
+  virtual const char** GetWhiteListedCrashKeys();
+
   // Returns true if running in unattended mode (for automated testing).
   virtual bool IsRunningUnattended();