cc: Fix lost context handling when using impl-side painting.

cc/layer_tree_host_impl.cc

Index: cc/layer_tree_host_impl.cc
diff --git a/cc/layer_tree_host_impl.cc b/cc/layer_tree_host_impl.cc
index e6b9ac99e0d49ae673f001b56a4ce6ad514d74aa..739c512c15cb39028af5cb9260d79bf6f22f7bfe 100644
--- a/cc/layer_tree_host_impl.cc
+++ b/cc/layer_tree_host_impl.cc
@@ -971,6 +971,7 @@ bool LayerTreeHostImpl::initializeRenderer(scoped_ptr<OutputSurface> outputSurfa
         sendDidLoseOutputSurfaceRecursive(rootLayer());
     }
     // Note: order is important here.
+    m_pendingTree.reset();

[enne (OOO), 2013/01/15 03:36:25]

You should apply the if statement above on line 969 to both the active and
pending tree.  The pending tree can still have non-resource data coming from the
main thread that shouldn't be thrown away.

[reveman, 2013/01/15 04:05:13]

Done.

     m_renderer.reset();
     m_tileManager.reset();
     m_resourceProvider.reset();
@@ -1003,6 +1004,7 @@ bool LayerTreeHostImpl::initializeRenderer(scoped_ptr<OutputSurface> outputSurfa
         m_renderer->setVisible(m_visible);
 
     m_client->onCanDrawStateChanged(canDraw());
+    m_client->onHasPendingTreeStateChanged(pendingTree());

[enne (OOO), 2013/01/15 03:36:25]

This can go away too.

[reveman, 2013/01/15 04:05:13]

Done.

 
     return true;
 }