Breakpad Linux: Do not use std::string in a compromised context.

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 bb30d80f0813a9ed74527652d18036ea65af4982..4032bd199d790a54047b1e80156becb91e216870 100644
--- a/components/crash/app/crash_reporter_client.h
+++ b/components/crash/app/crash_reporter_client.h
@@ -98,9 +98,9 @@ class CrashReporterClient {
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_IOS)
   // Returns a textual description of the product type and version to include
-  // in the crash report.
-  virtual void GetProductNameAndVersion(std::string* product_name,
-                                        std::string* version);
+  // in the crash report. Neither out parameter should be set to NULL.
+  virtual void GetProductNameAndVersion(const char** product_name,
+                                        const char** version);
 
   virtual base::FilePath GetReporterLogFilename();
 #endif