[sql] Track uploads of diagnostic data to prevent duplication.

components/history/core/browser/thumbnail_database.cc

Index: components/history/core/browser/thumbnail_database.cc
diff --git a/components/history/core/browser/thumbnail_database.cc b/components/history/core/browser/thumbnail_database.cc
index 35afa12319fc9a021b6c7c3d7dfd30971e35cf5f..e9226b2c7f4cc313028b6ce1bef1e73d8db95424 100644
--- a/components/history/core/browser/thumbnail_database.cc
+++ b/components/history/core/browser/thumbnail_database.cc
@@ -256,14 +256,14 @@ void GenerateDiagnostics(sql::Connection* db,
 
     // Corrupt cases currently dominate, report them very infrequently.
     static const uint64 kCorruptReportsPerMillion = 10000;
-    if (rand < kCorruptReportsPerMillion)
+    if (rand < kCorruptReportsPerMillion && db->RegisterIntentToUpload())
       ReportCorrupt(db, startup_kb);
   } else if (error == SQLITE_READONLY) {
     // SQLITE_READONLY appears similar to SQLITE_CORRUPT - once it
     // is seen, it is almost guaranteed to be seen again.
     reported = true;
 
-    if (rand < kReportsPerMillion)
+    if (rand < kReportsPerMillion && db->RegisterIntentToUpload())
       ReportError(db, extended_error);
   } else {
     // Only set the flag when making a report.  This should allow
@@ -276,7 +276,8 @@ void GenerateDiagnostics(sql::Connection* db,
     // channels, so probably easier to just harvest from the field.
     if (rand < kReportsPerMillion) {
       reported = true;
-      ReportError(db, extended_error);
+      if (db->RegisterIntentToUpload())
+        ReportError(db, extended_error);
     }
   }
 }