ToPrecision-exponential.patch

1e7bf0c636b8cca54dd83456a0f8fa219343e2a1 Bug 608195 - part 2 - extend ToPrecision to tell use whether exponential notation was used
diff --git a/mfbt/double-conversion/double-conversion.cc b/mfbt/double-conversion/double-conversion.cc
index febba6c..394b6a0 100644
--- a/mfbt/double-conversion/double-conversion.cc
+++ b/mfbt/double-conversion/double-conversion.cc
@@ -283,7 +283,9 @@ bool DoubleToStringConverter::ToExponential(
 
 bool DoubleToStringConverter::ToPrecision(double value,
                                           int precision,
+                                          bool* used_exponential_notation,
                                           StringBuilder* result_builder) const {
+  *used_exponential_notation = false;
   if (Double(value).IsSpecial()) {
     return HandleSpecialValues(value, result_builder);
   }
@@ -325,6 +327,7 @@ bool DoubleToStringConverter::ToPrecision(double value,
       decimal_rep[i] = '0';
     }
 
+    *used_exponential_notation = true;
     CreateExponentialRepresentation(decimal_rep,
                                     precision,
                                     exponent,
diff --git a/mfbt/double-conversion/double-conversion.h b/mfbt/double-conversion/double-conversion.h
index 0900ba0..957575c 100644
--- a/mfbt/double-conversion/double-conversion.h
+++ b/mfbt/double-conversion/double-conversion.h
@@ -270,6 +270,7 @@ class DoubleToStringConverter {
   // exponent character, the exponent's sign, and at most 3 exponent digits).
   MFBT_API bool ToPrecision(double value,
                    int precision,
+                   bool* used_exponential_notation,
                    StringBuilder* result_builder) const;
 
   enum DtoaMode {