Offer user to send feedback from profile error dialog

components/webdata/common/web_database_backend.h

Index: components/webdata/common/web_database_backend.h
diff --git a/components/webdata/common/web_database_backend.h b/components/webdata/common/web_database_backend.h
index 341bb76d7ac5a095943fcd281970fc7316083309..a3ae1fc8a1d3a9429f06629782adc5b1f7cf521d 100644
--- a/components/webdata/common/web_database_backend.h
+++ b/components/webdata/common/web_database_backend.h
@@ -39,7 +39,11 @@ class WEBDATA_EXPORT WebDatabaseBackend
     virtual ~Delegate() {}
 
     // Invoked when the backend has finished loading the db.
-    virtual void DBLoaded(sql::InitStatus status) = 0;
+    // |status| is the result of initializing the db.
+    // |diagnostics| contains diagnostic information about the db, and it will
+    // only be populated when an error occurs.
+    virtual void DBLoaded(sql::InitStatus status,
+                          const std::string& diagnostics) = 0;
   };
 
   WebDatabaseBackend(
@@ -90,6 +94,9 @@ class WEBDATA_EXPORT WebDatabaseBackend
   virtual ~WebDatabaseBackend();
 
  private:
+  // Invoked on a db error.
+  void DatabaseErrorCallback(int error, sql::Statement* statement);
+
   // Commit the current transaction.
   void Commit();
 
@@ -119,6 +126,14 @@ class WEBDATA_EXPORT WebDatabaseBackend
   // fails), used to avoid continually trying to reinit if the db init fails.
   bool init_complete_;
 
+  // True if a catastrophic database error occurs and further error callbacks
+  // from the database should be ignored.
+  bool catastrophic_error_occurred_;
+
+  // If a catastrophic database error has occurred, this contains any available
+  // diagnostic information.
+  std::string diagnostics_;
+
   // Delegate. See the class definition above for more information.
   std::unique_ptr<Delegate> delegate_;