cc: Fix resource eviction with impl-side painting.

cc/thread_proxy.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/thread_proxy.h"
 
 #include "base/bind.h"
 #include "base/debug/trace_event.h"
 #include "cc/delay_based_time_source.h"
 #include "cc/draw_quad.h"
@@ skipping 686 matching lines @@
 {
     TRACE_EVENT0("cc", "ThreadProxy::scheduledActionCommit");
     DCHECK(isImplThread());
     DCHECK(m_commitCompletionEventOnImplThread);
     DCHECK(m_currentResourceUpdateControllerOnImplThread);
 
     // Complete all remaining texture updates.
     m_currentResourceUpdateControllerOnImplThread->finalize();
     m_currentResourceUpdateControllerOnImplThread.reset();
 
-    // If there are linked evicted backings, these backings' resources may be put into the
-    // impl tree, so we can't draw yet. Determine this before clearing all evicted backings.
-    bool newImplTreeHasNoEvictedResources = !m_layerTreeHost->contentsTextureManager()->linkedEvictedBackingsExist();
-
     m_layerTreeHostImpl->beginCommit();
     m_layerTreeHost->beginCommitOnImplThread(m_layerTreeHostImpl.get());
     m_layerTreeHost->finishCommitOnImplThread(m_layerTreeHostImpl.get());
-
-    if (newImplTreeHasNoEvictedResources) {
-        if (m_layerTreeHostImpl->contentsTexturesPurged())
-            m_layerTreeHostImpl->resetContentsTexturesPurged();
-    }
-
     m_layerTreeHostImpl->commitComplete();
 
     m_nextFrameIsNewlyCommittedFrameOnImplThread = true;
 
     if (m_layerTreeHost->settings().implSidePainting && m_layerTreeHost->blocksPendingCommit())
     {
         // For some layer types in impl-side painting, the commit is held until
         // the pending tree is activated.
         TRACE_EVENT_INSTANT0("cc", "HoldCommit");
         m_completionEventForCommitHeldOnTreeActivation = m_commitCompletionEventOnImplThread;
@@ skipping 341 matching lines @@
 }
 
 void ThreadProxy::capturePictureOnImplThread(CompletionEvent* completion, skia::RefPtr<SkPicture>* picture)
 {
     DCHECK(isImplThread());
     *picture = m_layerTreeHostImpl->capturePicture();
     completion->signal();
 }
 
 }  // namespace cc