DevTools: do not pro-actively query all StyleSheets for their content.

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

Index: third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleSheetHeader.js
diff --git a/third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleSheetHeader.js b/third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleSheetHeader.js
index 3ca043e94455d814e7afeccb06c0a6791b773aaf..f1856ddc0e6a2632122723520c095673978dc496 100644
--- a/third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleSheetHeader.js
+++ b/third_party/WebKit/Source/devtools/front_end/sdk/CSSStyleSheetHeader.js
@@ -33,8 +33,8 @@ WebInspector.CSSStyleSheetHeader.prototype = {
     originalContentProvider: function()
     {
         if (!this._originalContentProvider) {
-            var originalContentPromise = this._cssModel.originalStyleSheetText(this);
-            this._originalContentProvider = new WebInspector.StaticContentProvider(this.contentURL(), this.contentType(), originalContentPromise);
+            var lazyContent = this._cssModel.originalStyleSheetText.bind(this._cssModel, this);
+            this._originalContentProvider = new WebInspector.StaticContentProvider(this.contentURL(), this.contentType(), lazyContent);
         }
         return this._originalContentProvider;
     },
@@ -218,4 +218,4 @@ WebInspector.CSSStyleSheetHeader.OriginalContentProvider.prototype = {
 
         this.requestContent().then(performSearch);
     }
-}
+}