cc: Set tile manager memory policy in initializeRenderer.

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index a96608952e5dde5824227e42ee3184b2f741a01e..c708b6e52041e5c86905cd404930aeb2253b94ba 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1393,6 +1393,14 @@ bool LayerTreeHostImpl::InitializeRenderer(
     renderer_ = SoftwareRenderer::Create(this,
                                          output_surface.get(),
                                          resource_provider.get());
+
+    const size_t software_memory_limit_when_visible = 128 * 1024 * 1024;
+    const size_t software_memory_limit_when_not_visible = 64 * 1024 * 1024;
+    SetManagedMemoryPolicy(ManagedMemoryPolicy(
+        software_memory_limit_when_visible,
+        ManagedMemoryPolicy::CUTOFF_ALLOW_EVERYTHING,
+        software_memory_limit_when_not_visible,
+        ManagedMemoryPolicy::CUTOFF_ALLOW_REQUIRED_ONLY));

[ccameron, 2013/04/29 23:58:46]

I'd suggest 0 and NOTHING for non-visible tabs (cause otherwise you'll end up
with a lot of memory being use when there are lots of backgrounded tabs).

   }
   if (!renderer_)
     return false;