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..f89e3232eae731851de8030534530d3f9f057da0 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* stmt);
+
   // Commit the current transaction.
   void Commit();
 
@@ -115,6 +122,10 @@ class WEBDATA_EXPORT WebDatabaseBackend
   // before the db is ready.
   sql::InitStatus init_status_;
 
+  // Contains diagnostic information about the database that will be filled when

[sky, 2016/08/02 13:27:21]

'will be filled' -> is non-empty

[afakhry, 2016/08/02 23:58:24]

Done.

+  // a catastrophic error occurs.
+  std::string db_diagnostics_;
+
   // True if an attempt has been made to load the database (even if the attempt
   // fails), used to avoid continually trying to reinit if the db init fails.
   bool init_complete_;