Model each Dart library as its own ScriptState when devtools are enabled.

Source/bindings/dart/DartDebugHooks.js

Index: Source/bindings/dart/DartDebugHooks.js
diff --git a/Source/bindings/dart/DartDebugHooks.js b/Source/bindings/dart/DartDebugHooks.js
index 3793cf457749174f4b6c6682bc1f76580866efcd..3d307db4f5b72a30f1fa05c0d498c49b154cdb43 100644
--- a/Source/bindings/dart/DartDebugHooks.js
+++ b/Source/bindings/dart/DartDebugHooks.js
@@ -144,19 +144,6 @@ DartDebug.FrameMirror.prototype = {
 
     evaluate: function(expression, disableBreak)
     {
-        // FIXME: Dart VM doesn't currently support evaluations. Use
-        // JavaScript eval and 'with' statement to emulate evaluation on Dart
-        // call frame.
-
-        // FIXME: dartbug.com/10434 find a less fragile way to determine whether
-        // we need to strip off console API support added by InjectedScript.
-        var CONSOLE_API_SUPPORT_HEADER =
-            'with ((this && this.console && this.console._commandLineAPI) || {}) {\n';
-        if (expression.indexOf(CONSOLE_API_SUPPORT_HEADER) == 0) {
-            expression = expression.substr(expression.indexOf('\n') + 1);
-            expression = expression.substr(0, expression.lastIndexOf('\n'));
-        }
-
         var result = DartDebug.nativeCallbacks.invocationTrampoline(
             DartDebug.nativeCallbacks.evaluateInScope,
             [expression, this._localScope.receiver(), this._callFrame.functionProxy, this._callFrame.localVariables]);