Rename CompilationError.location to CompilationError.span

pkg/front_end/lib/compilation_error.dart

Index: pkg/front_end/lib/compilation_error.dart
diff --git a/pkg/front_end/lib/compilation_error.dart b/pkg/front_end/lib/compilation_error.dart
index a2385759482cb147c1b7e8061fee76fd03712f28..5e30da1c730cc5c961d11cc81b8610f704e4887c 100644
--- a/pkg/front_end/lib/compilation_error.dart
+++ b/pkg/front_end/lib/compilation_error.dart
@@ -18,8 +18,8 @@ abstract class CompilationError {
   /// A text description of how the user can fix the error.  May be `null`.
   String get correction;
 
-  /// The source location where the error occurred.
-  SourceSpan get location;
+  /// The source span where the error occurred.
+  SourceSpan get span;
 
   /// A text description of the compile error.
   String get message;