DevTools: rename SourceEditor to SourceView, make entire SourcesPanel a drop target.

LayoutTests/inspector/jump-to-previous-editing-location.html

Index: LayoutTests/inspector/jump-to-previous-editing-location.html
diff --git a/LayoutTests/inspector/jump-to-previous-editing-location.html b/LayoutTests/inspector/jump-to-previous-editing-location.html
index 983dca0ed1748ce3f79ce2cd6531e6909c3970e0..ee8fa9af764eacd9e784f2e6832f781283810c0b 100644
--- a/LayoutTests/inspector/jump-to-previous-editing-location.html
+++ b/LayoutTests/inspector/jump-to-previous-editing-location.html
@@ -10,9 +10,9 @@ function test()
 {
     WebInspector.inspectorView.showPanel("sources");
     var panel = WebInspector.panels.sources;
-    var sourcesEditor = panel._sourcesEditor;
-    var historyManager = sourcesEditor._historyManager;
-    var editorContainer = sourcesEditor._editorContainer;
+    var sourcesView = panel._sourcesView;
+    var historyManager = sourcesView._historyManager;
+    var editorContainer = sourcesView._editorContainer;
 
     function rollback()
     {