cc: Fix resource eviction with impl-side painting.

cc/single_thread_proxy.cc

Index: cc/single_thread_proxy.cc
diff --git a/cc/single_thread_proxy.cc b/cc/single_thread_proxy.cc
index 1dc1e6bb95354af91577bad1643439ce586dd5f9..f4b7f290094b9af9da8c66fa930ac7412e18520a 100644
--- a/cc/single_thread_proxy.cc
+++ b/cc/single_thread_proxy.cc
@@ -7,6 +7,7 @@
 #include "base/debug/trace_event.h"
 #include "cc/draw_quad.h"
 #include "cc/layer_tree_host.h"
+#include "cc/layer_tree_impl.h"
 #include "cc/output_surface.h"
 #include "cc/prioritized_resource_manager.h"
 #include "cc/resource_update_controller.h"
@@ -257,7 +258,7 @@ void SingleThreadProxy::stop()
         DebugScopedSetMainThreadBlocked mainThreadBlocked(this);
         DebugScopedSetImplThread impl(this);
 
-        if (!m_layerTreeHostImpl->contentsTexturesPurged())
+        if (!m_layerTreeHostImpl->activeTree()->ContentsTexturesPurged())
             m_layerTreeHost->deleteContentsTexturesOnImplThread(m_layerTreeHostImpl->resourceProvider());
         m_layerTreeHostImpl.reset();
     }
@@ -344,9 +345,6 @@ bool SingleThreadProxy::commitAndComposite()
     scoped_ptr<ResourceUpdateQueue> queue = make_scoped_ptr(new ResourceUpdateQueue);
     m_layerTreeHost->updateLayers(*(queue.get()), m_layerTreeHostImpl->memoryAllocationLimitBytes());
 
-    if (m_layerTreeHostImpl->contentsTexturesPurged())
-        m_layerTreeHostImpl->resetContentsTexturesPurged();
-
     m_layerTreeHost->willCommit();
     doCommit(queue.Pass());
     bool result = doComposite();