Only recycle and evict textures not in-use on the impl thread.

cc/CCPrioritizedTextureManager.cpp

Index: cc/CCPrioritizedTextureManager.cpp
diff --git a/cc/CCPrioritizedTextureManager.cpp b/cc/CCPrioritizedTextureManager.cpp
index 584d6caa5663ac5db846252479b8f34b779e249e..3768fb1855ac6405601dac3e980f2b2d31f9769a 100644
--- a/cc/CCPrioritizedTextureManager.cpp
+++ b/cc/CCPrioritizedTextureManager.cpp
@@ -173,9 +173,6 @@ void CCPrioritizedTextureManager::acquireBackingTextureIfNeeded(CCPrioritizedTex
     if (texture->backing() || !texture->isAbovePriorityCutoff())
         return;
 
-    // Make sure that the backings list is up to date and sorted before traversing it.
-    updateBackingsPriorities();
-
     // Find a backing below, by either recycling or allocating.
     CCPrioritizedTexture::Backing* backing = 0;
 
@@ -227,9 +224,6 @@ void CCPrioritizedTextureManager::reduceMemory(CCResourceProvider* resourceProvi
 {
     ASSERT(CCProxy::isImplThread() && CCProxy::isMainThreadBlocked());
 
-    // Make sure that the backings list is up to date and sorted before traversing it.
-    updateBackingsPriorities();
-
     evictBackingsToReduceMemory(m_memoryAvailableBytes, RespectManagerPriorityCutoff, resourceProvider);
     ASSERT(memoryUseBytes() <= maxMemoryLimitBytes());
 
@@ -240,7 +234,7 @@ void CCPrioritizedTextureManager::reduceMemory(CCResourceProvider* resourceProvi
     // backing textures (any more than 10%).
     size_t wastedMemory = 0;
     for (BackingSet::iterator it = m_backings.begin(); it != m_backings.end(); ++it) {
-        if ((*it)->owner())
+        if ((*it)->hadOwnerAtLastPriorityUpdate())
             break;
         wastedMemory += (*it)->bytes();
     }