cc: Set tile manager memory policy in initializeRenderer.

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 
 #include "base/basictypes.h"
 #include "base/debug/trace_event.h"
@@ skipping 1375 matching lines @@
                                            resource_provider.get());
   } else if (output_surface->context3d()) {
     renderer_ = GLRenderer::Create(this,
                                    output_surface.get(),
                                    resource_provider.get(),
                                    settings_.highp_threshold_min);
   } else if (output_surface->software_device()) {
     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;
 
   resource_provider_ = resource_provider.Pass();
   output_surface_ = output_surface.Pass();
 
   if (!visible_)
     renderer_->SetVisible(visible_);
 
@@ skipping 731 matching lines @@
 }
 
 void LayerTreeHostImpl::SetDebugState(const LayerTreeDebugState& debug_state) {
   if (debug_state_.continuous_painting != debug_state.continuous_painting)
     paint_time_counter_->ClearHistory();
 
   debug_state_ = debug_state;
 }
 
 }  // namespace cc