Add analyzer support for multiple processes.

components/browser_watcher/postmortem_report_extractor.cc

Index: components/browser_watcher/postmortem_report_extractor.cc
diff --git a/components/browser_watcher/postmortem_report_extractor.cc b/components/browser_watcher/postmortem_report_extractor.cc
index bd12a9a03b4b87f9892195c6a3806bd1d6fce629..70c4a8d374ad43f165904420853508c92c3b5e88 100644
--- a/components/browser_watcher/postmortem_report_extractor.cc
+++ b/components/browser_watcher/postmortem_report_extractor.cc
@@ -216,8 +216,13 @@ CollectionStatus Extract(const base::FilePath& stability_file,
   // Early exit if there is no data.
   std::vector<std::string> log_messages = global_analyzer->GetLogMessages();
   ActivityUserData::Snapshot global_data_snapshot =
-      global_analyzer->GetGlobalUserDataSnapshot();
-  ThreadActivityAnalyzer* thread_analyzer = global_analyzer->GetFirstAnalyzer();
+      global_analyzer->GetGlobalDataSnapshot();
+
+  // Extract data for only the first process.
+  // TODO(manzagop): Extend this to all processes.
+  int64_t pid = global_analyzer->GetFirstProcess();
+  ThreadActivityAnalyzer* thread_analyzer =
+      global_analyzer->GetFirstAnalyzer(pid);
   if (log_messages.empty() && global_data_snapshot.empty() &&
       !thread_analyzer) {
     return DEBUG_FILE_NO_DATA;
@@ -237,7 +242,7 @@ CollectionStatus Extract(const base::FilePath& stability_file,
   // Note: a single process is instrumented.
   ProcessState* process_state = report->add_process_states();
   for (; thread_analyzer != nullptr;
-       thread_analyzer = global_analyzer->GetNextAnalyzer()) {
+       thread_analyzer = global_analyzer->GetNextAnalyzer(pid)) {
     // Only valid analyzers are expected per contract of GetFirstAnalyzer /
     // GetNextAnalyzer.
     DCHECK(thread_analyzer->IsValid());