Decouple stability instrumentation recording and collection

components/browser_watcher/stability_paths.h

Index: components/browser_watcher/stability_paths.h
diff --git a/components/browser_watcher/stability_paths.h b/components/browser_watcher/stability_paths.h
index 7941c3782d6375a0c95ef7e28ec2b1f74d982b06..0b2078fbf9673c582f9ebab954ccd87b0a492ad0 100644
--- a/components/browser_watcher/stability_paths.h
+++ b/components/browser_watcher/stability_paths.h
@@ -5,6 +5,9 @@
 #ifndef COMPONENTS_BROWSER_WATCHER_STABILITY_PATHS_H_
 #define COMPONENTS_BROWSER_WATCHER_STABILITY_PATHS_H_
 
+#include <set>
+#include <vector>
+
 #include "base/files/file_path.h"
 #include "base/process/process.h"
 #include "build/build_config.h"
@@ -35,6 +38,13 @@ bool GetStabilityFileForProcess(const base::Process& process,
 // Returns a pattern that matches file names returned by GetFileForProcess.
 base::FilePath::StringType GetStabilityFilePattern();
 
+// Returns files in |stability_dir| that match |stability_file_pattern|,
+// excluding those in |excluded_stability_files|.
+std::vector<base::FilePath> GetStabilityFiles(
+    const base::FilePath& stability_dir,
+    const base::FilePath::StringType& stability_file_pattern,
+    const std::set<base::FilePath>& excluded_stability_files);
+
 // Sets the current process's stability file's state to deleted (via the
 // GlobalActivityTracker) and opens the file for deletion. Metrics pertaining to
 // stability recording are logged.