DevTools: use inotify to pick changes on the filesystem.

third_party/WebKit/Source/devtools/front_end/bindings/FileSystemWorkspaceBinding.js

Index: third_party/WebKit/Source/devtools/front_end/bindings/FileSystemWorkspaceBinding.js
diff --git a/third_party/WebKit/Source/devtools/front_end/bindings/FileSystemWorkspaceBinding.js b/third_party/WebKit/Source/devtools/front_end/bindings/FileSystemWorkspaceBinding.js
index d4e51a18ad8a51d2ac582fee131cdeee9397d2d9..d8e69f0e971539d59af0b4146515a6c904322497 100644
--- a/third_party/WebKit/Source/devtools/front_end/bindings/FileSystemWorkspaceBinding.js
+++ b/third_party/WebKit/Source/devtools/front_end/bindings/FileSystemWorkspaceBinding.js
@@ -39,6 +39,7 @@ WebInspector.FileSystemWorkspaceBinding = function(isolatedFileSystemManager, wo
     this._workspace = workspace;
     this._isolatedFileSystemManager.addEventListener(WebInspector.IsolatedFileSystemManager.Events.FileSystemAdded, this._fileSystemAdded, this);
     this._isolatedFileSystemManager.addEventListener(WebInspector.IsolatedFileSystemManager.Events.FileSystemRemoved, this._fileSystemRemoved, this);
+    this._isolatedFileSystemManager.addEventListener(WebInspector.IsolatedFileSystemManager.Events.FileSystemFilesChanged, this._fileSystemFilesChanged, this);
     /** @type {!Map.<string, !WebInspector.FileSystemWorkspaceBinding.FileSystem>} */
     this._boundFileSystems = new Map();
 
@@ -98,6 +99,22 @@ WebInspector.FileSystemWorkspaceBinding.prototype = {
     },
 
     /**
+     * @param {!WebInspector.Event} event
+     */
+    _fileSystemFilesChanged: function(event)
+    {
+        var paths = /** @type {!Array<string>} */ (event.data);
+        for (var path of paths) {
+            var normalizedPath = WebInspector.IsolatedFileSystem.normalizePath(path);
+            for (var key of this._boundFileSystems.keys()) {
+                if (!normalizedPath.startsWith(key))
+                    continue;
+                this._boundFileSystems.get(key)._fileChanged(normalizedPath.substr(key.length + 1));
+            }
+        }
+    },
+
+    /**
      * @param {string} projectId
      * @return {string}
      */
@@ -233,7 +250,7 @@ WebInspector.FileSystemWorkspaceBinding.FileSystem = function(fileSystemWorkspac
 
     this._projectId = WebInspector.FileSystemWorkspaceBinding.projectId(this._fileSystem.path());
     console.assert(!this._workspace.project(this._projectId));
-    this._workspace.addProject(this._projectId, this);
+    this._project = this._workspace.addProject(this._projectId, this);
     this.populate();
 }
 
@@ -617,6 +634,19 @@ WebInspector.FileSystemWorkspaceBinding.FileSystem.prototype = {
         this.dispatchEventToListeners(WebInspector.ProjectDelegate.Events.FileRemoved, path);
     },
 
+    /**
+     * @param {string} path
+     */
+    _fileChanged: function(path)
+    {
+        var uiSourceCode = this._project.uiSourceCode(path);
+        if (!uiSourceCode) {
+            this._addFile(path);
+            return;
+        }
+        this.dispatchEventToListeners(WebInspector.ProjectDelegate.Events.FileChanged, path);

[dgozman, 2015/11/05 01:13:50]

If you already have uiSourceCode here, why issue an event and not update right
here?

+    },
+
     dispose: function()
     {
         this._workspace.removeProject(this._projectId);