Move ErrorDelegate to its own file and add static utility functions to ErrorDelegate

chrome/browser/diagnostics/sqlite_diagnostics.cc

Index: chrome/browser/diagnostics/sqlite_diagnostics.cc
diff --git a/chrome/browser/diagnostics/sqlite_diagnostics.cc b/chrome/browser/diagnostics/sqlite_diagnostics.cc
index 3fba29e7e9c701fd4c96d76dba5cabba36346905..6d51e7e515e8e2995e9e41c666cb9e520ffb3d5a 100644
--- a/chrome/browser/diagnostics/sqlite_diagnostics.cc
+++ b/chrome/browser/diagnostics/sqlite_diagnostics.cc
@@ -95,7 +95,6 @@ class HistogramUniquifier {
  public:
   static const char* name() {
     const char* kHistogramNames[] = {
-      "Sqlite.Cookie.Error",
       "Sqlite.History.Error",
       "Sqlite.Thumbnail.Error",
       "Sqlite.Text.Error",
@@ -107,24 +106,20 @@ class HistogramUniquifier {
 
 }  // namespace
 
-sql::ErrorDelegate* GetErrorHandlerForCookieDb() {
-  return new sql::DiagnosticErrorDelegate<HistogramUniquifier<0> >();
-}
-
 sql::ErrorDelegate* GetErrorHandlerForHistoryDb() {
-  return new sql::DiagnosticErrorDelegate<HistogramUniquifier<1> >();
+  return new sql::DiagnosticErrorDelegate<HistogramUniquifier<0> >();
 }
 
 sql::ErrorDelegate* GetErrorHandlerForThumbnailDb() {
-  return new sql::DiagnosticErrorDelegate<HistogramUniquifier<2> >();
+  return new sql::DiagnosticErrorDelegate<HistogramUniquifier<1> >();
 }
 
 sql::ErrorDelegate* GetErrorHandlerForTextDb() {
-  return new sql::DiagnosticErrorDelegate<HistogramUniquifier<3> >();
+  return new sql::DiagnosticErrorDelegate<HistogramUniquifier<2> >();
 }
 
 sql::ErrorDelegate* GetErrorHandlerForWebDb() {
-  return new sql::DiagnosticErrorDelegate<HistogramUniquifier<4> >();
+  return new sql::DiagnosticErrorDelegate<HistogramUniquifier<3> >();
 }
 
 DiagnosticTest* MakeSqliteWebDbTest() {