Add fine-grained diff implementation to LiveEdit engine.

src/liveedit-debugger.js

Index: src/liveedit-debugger.js
diff --git a/src/liveedit-debugger.js b/src/liveedit-debugger.js
index 7ed22c84aadaaed25665f6826dd5f5e2c505addc..e05c53ce1841b35c1f3ca19264b857d154a689a3 100644
--- a/src/liveedit-debugger.js
+++ b/src/liveedit-debugger.js
@@ -980,15 +980,15 @@ Debug.LiveEdit = new function() {
   // LiveEdit main entry point: changes a script text to a new string.
   function SetScriptSource(script, new_source, preview_only, change_log) {
     var old_source = script.source;
-    var diff = CompareStringsLinewise(old_source, new_source);
+    var diff = CompareStrings(old_source, new_source);
     return ApplyPatchMultiChunk(script, diff, new_source, preview_only,
         change_log);
   }
   // Function is public.
   this.SetScriptSource = SetScriptSource;
 
-  function CompareStringsLinewise(s1, s2) {
-    return %LiveEditCompareStringsLinewise(s1, s2);
+  function CompareStrings(s1, s2) {
+    return %LiveEditCompareStrings(s1, s2);
   }
 
   // Applies the change to the script.
@@ -1076,7 +1076,7 @@ Debug.LiveEdit = new function() {
   // Functions are public for tests.
   this.TestApi = {
     PosTranslator: PosTranslator,
-    CompareStringsLinewise: CompareStringsLinewise,
+    CompareStrings: CompareStrings,
     ApplySingleChunkPatch: ApplySingleChunkPatch
   }
 }