[#2] Pass gfx structs by const ref (gfx::Rect, gfx::RectF)

cc/layers/layer_perftest.cc

 // Copyright 2013 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/layers/layer.h"
 
 #include "cc/resources/layer_painter.h"
 #include "cc/test/fake_impl_proxy.h"
 #include "cc/test/fake_layer_tree_host.h"
 #include "cc/test/fake_layer_tree_host_client.h"
 #include "cc/test/fake_layer_tree_host_impl.h"
 #include "cc/test/lap_timer.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "testing/perf/perf_test.h"
 
 namespace cc {
 namespace {
 
 static const int kTimeLimitMillis = 3000;
 static const int kWarmupRuns = 5;
 static const int kTimeCheckInterval = 10;
 
 class MockLayerPainter : public LayerPainter {
  public:
   virtual void Paint(SkCanvas* canvas,
-                     gfx::Rect content_rect,
+                     const gfx::Rect& content_rect,
                      gfx::RectF* opaque) OVERRIDE {}
 };
 
 
 class LayerPerfTest : public testing::Test {
  public:
   LayerPerfTest()
       : host_impl_(&proxy_),
         fake_client_(FakeLayerTreeHostClient::DIRECT_3D),
         timer_(kWarmupRuns,
@@ skipping 73 matching lines @@
                          "",
                          "props_didnt_change",
                          timer_.LapsPerSecond(),
                          "runs/s",
                          true);
 }
 
 
 }  // namespace
 }  // namespace cc