DevTools: Only provide static script content to UISourceCode

third_party/WebKit/Source/devtools/front_end/sdk/Script.js

Index: third_party/WebKit/Source/devtools/front_end/sdk/Script.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/Script.js b/third_party/WebKit/Source/devtools/front_end/sdk/Script.js
index c02c26fc0ec8a7e1fc63988c45fd1d6c84b7cfc5..63d101b95b2092a6f544abd6cacf0bb298955900 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/Script.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/Script.js
@@ -71,6 +71,8 @@ SDK.Script = class {
     this._isLiveEdit = isLiveEdit;
     this.sourceMapURL = sourceMapURL;
     this.hasSourceURL = hasSourceURL;
+    this._originalContentProvider = null;
+    this._originalSource = null;
   }
 
   /**
@@ -186,11 +188,34 @@ SDK.Script = class {
       } else {
         this._source = '';
       }
+      if (this._originalSource === null)
+        this._originalSource = this._source;
       callback(this._source);
     }
   }
 
   /**
+   * @return {!Common.ContentProvider}
+   */
+  originalContentProvider() {
+    if (!this._originalContentProvider) {

[pfeldman, 2017/02/27 22:56:09]

return this.requestContent().then(() => this._originalSource);

[einbinder, 2017/02/28 00:51:22]

() => this.requestContent().then(() => this._originalSource);

+      var lazyContent = this._requestOriginalContent.bind(this);
+      this._originalContentProvider =
+          new Common.StaticContentProvider(this.contentURL(), this.contentType(), lazyContent);
+    }
+    return this._originalContentProvider;
+  }
+
+  /**
+   * @return {!Promise<?string>}
+   */
+  _requestOriginalContent() {
+    if (this._originalSource === null)
+      return this.requestContent();
+    return Promise.resolve(/** @type {?string} */ (this._originalSource));
+  }
+
+  /**
    * @override
    * @param {string} query
    * @param {boolean} caseSensitive
@@ -261,8 +286,9 @@ SDK.Script = class {
     newSource = this._appendSourceURLCommentIfNeeded(newSource);
 
     if (this.scriptId) {
-      this.debuggerModel.target().debuggerAgent().setScriptSource(
-          this.scriptId, newSource, undefined, didEditScriptSource.bind(this));
+      this._requestOriginalContent().then(
+          () => this.debuggerModel.target().debuggerAgent().setScriptSource(
+              this.scriptId, newSource, undefined, didEditScriptSource.bind(this)));
     } else {
       callback('Script failed to parse');
     }