Crash component: adds API for clients to handle the crash minidump.

components/crash/app/crash_reporter_client.h

Index: components/crash/app/crash_reporter_client.h
diff --git a/components/crash/app/crash_reporter_client.h b/components/crash/app/crash_reporter_client.h
index 4032bd199d790a54047b1e80156becb91e216870..3a580b7214e530ccac00f7857def4b64aa1a3cc6 100644
--- a/components/crash/app/crash_reporter_client.h
+++ b/components/crash/app/crash_reporter_client.h
@@ -103,6 +103,13 @@ class CrashReporterClient {
                                         const char** version);
 
   virtual base::FilePath GetReporterLogFilename();
+
+  // Custom crash minidump handler after the minidump is generated.
+  // Returns true if the minidump is handled (client); otherwise, return false
+  // to fallback to default handler.
+  // WARNING: this handler runs in a compromised context. It may not call into
+  // libc nor allocate memory normally.
+  virtual bool HandleCrashDump(const char* crashdump_filename);
 #endif
 
   // The location where minidump files should be written. Returns true if