Add analyzer support for multiple processes.

components/browser_watcher/postmortem_report_extractor.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/browser_watcher/postmortem_report_extractor.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 198 matching lines @@
 
   // Create a global analyzer.
   std::unique_ptr<GlobalActivityAnalyzer> global_analyzer =
       GlobalActivityAnalyzer::CreateWithFile(stability_file);
   if (!global_analyzer)
     return ANALYZER_CREATION_FAILED;
 
   // 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;
   }
 
   // Collect log messages.
   for (const std::string& message : log_messages) {
     report->add_log_messages(message);
   }
 
@@ skipping 22 matching lines @@
     CollectThread(thread_analyzer->activity_snapshot(), thread_state);
   }
 
   // Collect module information.
   CollectModuleInformation(global_analyzer->GetModules(), process_state);
 
   return SUCCESS;
 }
 
 }  // namespace browser_watcher