Revert of Centralize deferred commit conditions.

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index fc70d14a59351ddd55664b363a1ab122e26b7481..26b33075eb8218667929384816530a6a3338dc64 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -367,7 +367,6 @@
     , TreeScope(*this)
     , m_hasNodesWithPlaceholderStyle(false)
     , m_evaluateMediaQueriesOnStyleRecalc(false)
-    , m_shouldProcessFrameLifecycle(false)
     , m_pendingSheetLayout(NoLayoutWithPendingSheets)
     , m_frame(initializer.frame())
     , m_domWindow(m_frame ? m_frame->localDOMWindow() : 0)
@@ -5087,19 +5086,6 @@
     updateLayout();
 }
 
-bool Document::shouldProcessFrameLifecycle()
-{
-    if (m_shouldProcessFrameLifecycle)
-        return true;
-    if (!isRenderingReady())
-        return false;
-    if ((isHTMLDocument() || isXHTMLDocument()) && !body() && parsing())
-        return false;
-    // Once the page starts processing the pipeline we should never stop.
-    m_shouldProcessFrameLifecycle = true;
-    return true;
-}
-
 ScriptedAnimationController& Document::ensureScriptedAnimationController()
 {
     if (!m_scriptedAnimationController) {