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Bug 732206 - Fix Ts failures by preventing some errors from appearing in logcat. r=Cwiiis
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@ -1572,6 +1572,8 @@ Tab.prototype = {
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refreshDisplayPort: function(aDisplayPortMargins) {
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if (this._zoom <= 0)
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return;
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if (!this.browser.contentDocument.documentElement)
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return;
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let viewport = this.viewport;
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