DevTools: sort sourceMap mappings since they might not be ordered.

third_party/WebKit/LayoutTests/http/tests/inspector/text-source-map.html

Index: third_party/WebKit/LayoutTests/http/tests/inspector/text-source-map.html
diff --git a/third_party/WebKit/LayoutTests/http/tests/inspector/text-source-map.html b/third_party/WebKit/LayoutTests/http/tests/inspector/text-source-map.html
index 2e5f1f137a87f30b7ea7f0c73ec0275639e16526..671b042aae8b948669a827e310951e68103e1009 100644
--- a/third_party/WebKit/LayoutTests/http/tests/inspector/text-source-map.html
+++ b/third_party/WebKit/LayoutTests/http/tests/inspector/text-source-map.html
@@ -72,8 +72,8 @@ function test()
         function testNoMappingEntry(next)
         {
             var mappingPayload = {
-                "mappings":"AAAA,C,CAAE;",
-                "sources":["example.js"]
+                "mappings": "AAAA,C,CAAE;",
+                "sources": ["example.js"]
             };
             var mapping = new SDK.TextSourceMap("compiled.js", "source-map.json", mappingPayload);
             checkMapping(0, 0, "example.js", 0, 0, mapping);
@@ -95,6 +95,28 @@ function test()
             next();
         },
 
+        function testNonSortedMappings(next)
+        {
+            /*
+                example.js:
+                ABCD
+
+                compiled.js:
+                DCBA
+             */
+            var mappingPayload = {
+                // mappings go in reversed direction.
+                "mappings": "GAAA,DAAC,DAAC,DAAC",
+                "sources": ["example.js"]
+            };
+            var mapping = new SDK.TextSourceMap("compiled.js", "source-map.json", mappingPayload);
+            checkMapping(0, 0, "example.js", 0, 3, mapping);
+            checkMapping(0, 1, "example.js", 0, 2, mapping);
+            checkMapping(0, 2, "example.js", 0, 1, mapping);
+            checkMapping(0, 3, "example.js", 0, 0, mapping);
+            next();
+        },
+
         function testSections(next)
         {
             var mappingPayload = {