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..3347e79ee8bbff979b8791e46e95a18c6dab5c93 100644
--- a/components/crash/content/app/crash_reporter_client.h
+++ b/components/crash/content/app/crash_reporter_client.h
@@ -8,7 +8,9 @@
 #include <stddef.h>
 
 #include <string>
+#include <vector>
 
+#include "base/debug/crash_logging.h"
 #include "base/strings/string16.h"
 #include "build/build_config.h"
 
@@ -144,6 +146,11 @@ class CrashReporterClient {
   // reporting server. Returns the size of the union of all keys.
   virtual size_t RegisterCrashKeys();
 
+  // TODO #if defined(USE_WHITELIST)? (would that work with monochrome? I.e.
+  // will this code differ between clank and WebView - or will we compile it
+  // with the same defines?)
+  virtual std::vector<base::debug::CrashKey> GetWhiteListedCrashKeys();
+
   // Returns true if running in unattended mode (for automated testing).
   virtual bool IsRunningUnattended();