Merge 112568 - [chromium] Ensure framebuffer exists at the start of beginDrawingFrame.

Source/WebCore/platform/graphics/chromium/cc/CCThreadProxy.cpp

Index: Source/WebCore/platform/graphics/chromium/cc/CCThreadProxy.cpp
===================================================================
--- Source/WebCore/platform/graphics/chromium/cc/CCThreadProxy.cpp	(revision 112692)
+++ Source/WebCore/platform/graphics/chromium/cc/CCThreadProxy.cpp	(working copy)
@@ -93,8 +93,6 @@
     ASSERT(isMainThread());
     ASSERT(m_layerTreeHost);
 
-    ScopedEnsureFramebufferAllocation ensureFramebuffer(m_layerTreeHostImpl->layerRenderer());
-
     if (!m_layerRendererInitialized) {
         TRACE_EVENT("compositeAndReadback_EarlyOut_LR_Uninitialized", this, 0);
         return false;
@@ -125,6 +123,7 @@
         request->completion.signal();
         return;
     }
+
     m_readbackRequestOnImplThread = request;
     m_schedulerOnImplThread->setNeedsRedraw();
     m_schedulerOnImplThread->setNeedsForcedRedraw();