fix for dartbug.com/23032 - breakpoints not triggering

editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/dartium/BreakpointManager.java

Index: editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/dartium/BreakpointManager.java
===================================================================
--- editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/dartium/BreakpointManager.java	(revision 44804)
+++ editor/tools/plugins/com.google.dart.tools.debug.core/src/com/google/dart/tools/debug/core/dartium/BreakpointManager.java	(working copy)
@@ -38,6 +38,8 @@
 import org.eclipse.debug.core.model.IBreakpoint;
 
 import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -236,6 +238,12 @@
         if (DartCore.isWindows() && packagePath.startsWith("/")) {
           packagePath = packagePath.substring(1);
         }
+        try {
+          // server returns a url encoded string, so decode before matching
+          packagePath = URLDecoder.decode(packagePath, "UTF-8");
+        } catch (UnsupportedEncodingException e) {
+          DartCore.logError(e);
+        }
         if (new Path(packagePath).equals(new Path(fileLocation))) {
           return null;
         }