DevTools: move FileSystemMapping from Workspace to Persistence

third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js

Index: third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js b/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
index cf933de55a06e1f0fdd09966b3a18b2ff02a80f4..553c47c0b5b66799a5ca75e27b6d42b4601d27f6 100644
--- a/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
+++ b/third_party/WebKit/Source/devtools/front_end/sources/SourcesPanel.js
@@ -751,7 +751,8 @@ Sources.SourcesPanel = class extends UI.Panel {
       if (!networkUISourceCode)
         return;
       var fileSystemPath = Persistence.FileSystemWorkspaceBinding.fileSystemPath(uiSourceCode.project().id());
-      Workspace.fileSystemMapping.addMappingForResource(networkUISourceCode.url(), fileSystemPath, uiSourceCode.url());
+      Persistence.fileSystemMapping.addMappingForResource(
+          networkUISourceCode.url(), fileSystemPath, uiSourceCode.url());
     }
   }
 
@@ -769,7 +770,8 @@ Sources.SourcesPanel = class extends UI.Panel {
       if (!uiSourceCode)
         return;
       var fileSystemPath = Persistence.FileSystemWorkspaceBinding.fileSystemPath(uiSourceCode.project().id());
-      Workspace.fileSystemMapping.addMappingForResource(networkUISourceCode.url(), fileSystemPath, uiSourceCode.url());
+      Persistence.fileSystemMapping.addMappingForResource(
+          networkUISourceCode.url(), fileSystemPath, uiSourceCode.url());
     }
   }
 
@@ -777,7 +779,7 @@ Sources.SourcesPanel = class extends UI.Panel {
    * @param {!Workspace.UISourceCode} uiSourceCode
    */
   _removeNetworkMapping(uiSourceCode) {
-    Workspace.fileSystemMapping.removeMappingForURL(uiSourceCode.url());
+    Persistence.fileSystemMapping.removeMappingForURL(uiSourceCode.url());
   }
 
   /**