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

cc/CCPrioritizedTexture.cpp

Index: cc/CCPrioritizedTexture.cpp
diff --git a/cc/CCPrioritizedTexture.cpp b/cc/CCPrioritizedTexture.cpp
index 2940e925227420bcf189cb22b1b853115003d336..f1d0539faaf9d28d0fa167d465fb62fb3462be99 100644
--- a/cc/CCPrioritizedTexture.cpp
+++ b/cc/CCPrioritizedTexture.cpp
@@ -83,7 +83,9 @@ void CCPrioritizedTexture::acquireBackingTexture(CCResourceProvider* resourcePro
 
 CCResourceProvider::ResourceId CCPrioritizedTexture::resourceId() const
 {
-    if (m_backing)
+    // We want to save some memory to safely recycle. So don't push all textures to the impl side.
+    // FIXME: We should push even less memory than the priority cut-off so long as it isn't visible.
+    if (m_backing && m_backing->wasAbovePriorityCutoffAtLastPriorityUpdate())
         return m_backing->id();
     return 0;
 }