Rework GetStabilityFileForProcess for use by Crashpad integration

components/metrics/execution_phase.cc

Index: components/metrics/execution_phase.cc
diff --git a/components/metrics/execution_phase.cc b/components/metrics/execution_phase.cc
index c37f05c594fed6bd08450ad36e4bc8166099f4f1..98f9aee136e00cf13568de6bb70619ffae6bccb5 100644
--- a/components/metrics/execution_phase.cc
+++ b/components/metrics/execution_phase.cc
@@ -4,6 +4,7 @@
 
 #include "components/metrics/execution_phase.h"
 
+#include "build/build_config.h"
 #include "components/browser_watcher/stability_data_names.h"
 #include "components/browser_watcher/stability_debugging.h"
 #include "components/metrics/metrics_pref_names.h"
@@ -34,9 +35,11 @@ void ExecutionPhaseManager::SetExecutionPhase(ExecutionPhase execution_phase) {
   execution_phase_ = execution_phase;
   local_state_->SetInteger(prefs::kStabilityExecutionPhase,
                            static_cast<int>(execution_phase_));
+#if defined(OS_WIN)
   browser_watcher::SetStabilityDataInt(
       browser_watcher::kStabilityExecutionPhase,
       static_cast<int>(execution_phase_));
+#endif  // defined(OS_WIN)
 }
 
 ExecutionPhase ExecutionPhaseManager::GetExecutionPhase() {