cc: Remove cc::settings, move them to LayerTreeSettings.

cc/scheduler_unittest.cc

Index: cc/scheduler_unittest.cc
diff --git a/cc/scheduler_unittest.cc b/cc/scheduler_unittest.cc
index 2441716f57c81656e75a15c5acd487d60d8ef48e..a9d61e93a0bf9d06b0bf0abbff655c27c1b4a2e3 100644
--- a/cc/scheduler_unittest.cc
+++ b/cc/scheduler_unittest.cc
@@ -55,6 +55,7 @@ public:
     virtual void scheduledActionBeginContextRecreation() OVERRIDE { m_actions.push_back("scheduledActionBeginContextRecreation"); }
     virtual void scheduledActionAcquireLayerTexturesForMainThread() OVERRIDE { m_actions.push_back("scheduledActionAcquireLayerTexturesForMainThread"); }
     virtual void didAnticipatedDrawTimeChange(base::TimeTicks) OVERRIDE { }
+    virtual const LayerTreeSettings& settings() const OVERRIDE { return m_settings; }
 
     void setDrawWillHappen(bool drawWillHappen) { m_drawWillHappen = drawWillHappen; }
     void setSwapWillHappenIfDrawHappens(bool swapWillHappenIfDrawHappens) { m_swapWillHappenIfDrawHappens = swapWillHappenIfDrawHappens; }
@@ -64,6 +65,7 @@ protected:
     bool m_swapWillHappenIfDrawHappens;
     int m_numDraws;
     std::vector<const char*> m_actions;
+    LayerTreeSettings m_settings;
 };
 
 TEST(SchedulerTest, RequestCommit)