Add 'hang-report' product data key to crash dumps generated for UI freeze.

This key will allow to split crash signature for UIFreeze crashes.

Bug: 1000861
Change-Id: Ia9e0fcd14096c5d15630a777137f4b3dd07f1bb8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1764903
Commit-Queue: Eugene But <eugenebut@chromium.org>
Reviewed-by: Peter Lee <pkl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#693899}

ios/chrome/browser/crash_report/breakpad_helper.h

@@ -66,6 +66,10 @@ void SetMemoryWarningCount(int count);
 // is 'true'), otherwise remove the key.
 void SetMemoryWarningInProgress(bool value);
 
+// Sets a key indicating that UI thread is frozen (if value is 'true'),
+// otherwise remove the key.
+void SetHangReport(bool value);
+
 // Sets a key indicating the current free memory amount in KB. 0 does not remove
 // the key as getting no memory is important information.
 void SetCurrentFreeMemoryInKB(int value);

ios/chrome/browser/crash_report/breakpad_helper.mm

@@ -46,6 +46,7 @@ NSString* const kCrashedInBackground = @"crashed_in_background";
 NSString* const kFreeDiskInKB = @"free_disk_in_kb";
 NSString* const kFreeMemoryInKB = @"free_memory_in_kb";
 NSString* const kMemoryWarningInProgress = @"memory_warning_in_progress";
+NSString* const kHangReport = @"hang-report";
 NSString* const kMemoryWarningCount = @"memory_warning_count";
 NSString* const kUptimeAtRestoreInMs = @"uptime_at_restore_in_ms";
 NSString* const kUploadedInRecoveryMode = @"uploaded_in_recovery_mode";
@@ -277,6 +278,13 @@ void SetMemoryWarningInProgress(bool value) {
     RemoveReportParameter(kMemoryWarningInProgress);
 }
 
+void SetHangReport(bool value) {
+  if (value)
+    AddReportParameter(kHangReport, @"yes", true);
+  else
+    RemoveReportParameter(kHangReport);
+}
+
 void SetCurrentFreeMemoryInKB(int value) {
   AddReportParameter(kFreeMemoryInKB, [NSString stringWithFormat:@"%d", value],
                      true);

ios/chrome/browser/crash_report/main_thread_freeze_detector.mm

@@ -6,6 +6,7 @@
 
 #include "base/metrics/histogram_macros.h"
 #include "base/time/time.h"
+#include "ios/chrome/browser/crash_report/breakpad_helper.h"
 #include "ios/chrome/browser/crash_report/crash_report_flags.h"
 #import "third_party/breakpad/breakpad/src/client/ios/Breakpad.h"
 #import "third_party/breakpad/breakpad/src/client/ios/BreakpadController.h"
@@ -179,6 +180,7 @@ void LogRecoveryTime(base::TimeDelta time) {
           if (!breakpadRef) {
             return;
           }
+          breakpad_helper::SetHangReport(true);
           NSDictionary* breakpadReportInfo =
               BreakpadGenerateReport(breakpadRef, nil);
           if (!breakpadReportInfo) {