Make SingleThreadProxy a SchedulerClient

cc/trees/layer_tree_host_unittest.cc

Index: cc/trees/layer_tree_host_unittest.cc
diff --git a/cc/trees/layer_tree_host_unittest.cc b/cc/trees/layer_tree_host_unittest.cc
index eb81d5b8e8a200dfb9e353a878cca21e998877a2..0450f743a5a6583a613693dc73725d7388223d1d 100644
--- a/cc/trees/layer_tree_host_unittest.cc
+++ b/cc/trees/layer_tree_host_unittest.cc
@@ -89,8 +89,8 @@ class LayerTreeHostTestSetNeedsCommit1 : public LayerTreeHostTest {
   }
 
   virtual void AfterTest() OVERRIDE {
-    EXPECT_GE(1, num_commits_);
-    EXPECT_GE(1, num_draws_);
+    EXPECT_LE(1, num_commits_);
+    EXPECT_LE(1, num_draws_);
   }
 
  private:
@@ -2371,6 +2371,7 @@ TEST(LayerTreeHostTest, PartialUpdatesWithGLRenderer) {
 
   scoped_ptr<LayerTreeHost> host =
       LayerTreeHost::CreateSingleThreaded(&client, &client, NULL, settings);
+  host->SetLayerTreeHostClientReady();
   EXPECT_TRUE(host->InitializeOutputSurfaceIfNeeded());
   EXPECT_EQ(4u, host->settings().max_partial_texture_updates);
 }
@@ -2383,6 +2384,7 @@ TEST(LayerTreeHostTest, PartialUpdatesWithSoftwareRenderer) {
 
   scoped_ptr<LayerTreeHost> host =
       LayerTreeHost::CreateSingleThreaded(&client, &client, NULL, settings);
+  host->SetLayerTreeHostClientReady();
   EXPECT_TRUE(host->InitializeOutputSurfaceIfNeeded());
   EXPECT_EQ(4u, host->settings().max_partial_texture_updates);
 }
@@ -2395,6 +2397,7 @@ TEST(LayerTreeHostTest, PartialUpdatesWithDelegatingRendererAndGLContent) {
 
   scoped_ptr<LayerTreeHost> host =
       LayerTreeHost::CreateSingleThreaded(&client, &client, NULL, settings);
+  host->SetLayerTreeHostClientReady();
   EXPECT_TRUE(host->InitializeOutputSurfaceIfNeeded());
   EXPECT_EQ(0u, host->MaxPartialTextureUpdates());
 }
@@ -2408,6 +2411,7 @@ TEST(LayerTreeHostTest,
 
   scoped_ptr<LayerTreeHost> host =
       LayerTreeHost::CreateSingleThreaded(&client, &client, NULL, settings);
+  host->SetLayerTreeHostClientReady();
   EXPECT_TRUE(host->InitializeOutputSurfaceIfNeeded());
   EXPECT_EQ(0u, host->MaxPartialTextureUpdates());
 }