Devtools: [WIP] Implement enhanced devtools extension language APIs

Source/devtools/front_end/sources/SourcesView.js

Index: Source/devtools/front_end/sources/SourcesView.js
diff --git a/Source/devtools/front_end/sources/SourcesView.js b/Source/devtools/front_end/sources/SourcesView.js
index 1d3bf4588ee37412457949aa1b26b25deba2dbdf..753c612522dfc147ad18d0b411b52dac032e0a32 100644
--- a/Source/devtools/front_end/sources/SourcesView.js
+++ b/Source/devtools/front_end/sources/SourcesView.js
@@ -78,6 +78,8 @@ WebInspector.SourcesView = function(workspace, sourcesPanel)
 
     this._shortcuts = {};
     this.element.addEventListener("keydown", this._handleKeyDown.bind(this), false);
+
+    this.addEventListener(WebInspector.SourcesView.Events.EditorSelected, WebInspector.languageService.updateInferredMime, WebInspector.languageService);
 }
 
 WebInspector.SourcesView.Events = {
@@ -95,7 +97,7 @@ WebInspector.SourcesView.uiSourceCodeHighlighterType = function(uiSourceCode)
     if (networkContentType)
         return networkContentType.canonicalMimeType();
 
-    var mimeType = WebInspector.ResourceType.mimeTypesForExtensions[uiSourceCode.extension().toLowerCase()];
+    var mimeType = WebInspector.ResourceType.mimeFromUrl(uiSourceCode.uri());

[wes, 2015/08/14 00:55:05]

I've been wavering about this for awhile - is .uri() or .contentURL() the
canonical URL for a file?

[pfeldman, 2015/08/17 21:15:52]

uri is the URI within workspace, contentURL is where it came from (fs or
network). You should take the mime from the name, i.e. uri.

[wes, 2015/08/25 18:13:18]

Alright - I think I've gone through and changed all the things I've added to
look at uri rather than contentURL, since we really care about its binding in
the sources pane.

     return mimeType || uiSourceCode.contentType().canonicalMimeType();
 }