Revert of [#7] Pass gfx structs by const ref (gfx::Size)

cc/output/gl_renderer_unittest.cc

Index: cc/output/gl_renderer_unittest.cc
diff --git a/cc/output/gl_renderer_unittest.cc b/cc/output/gl_renderer_unittest.cc
index 476f7a85bd67e48d6f90273f8d6c85c247f42b33..f7bb3bdb3623e6db2aed925613f71de5776cfc35 100644
--- a/cc/output/gl_renderer_unittest.cc
+++ b/cc/output/gl_renderer_unittest.cc
@@ -1059,8 +1059,8 @@
                           false) {
     surface_size_ = gfx::Size(500, 500);
   }
-  virtual void Reshape(const gfx::Size& size, float scale_factor) OVERRIDE {}
-  void set_fixed_size(const gfx::Size& size) { surface_size_ = size; }
+  virtual void Reshape(gfx::Size size, float scale_factor) OVERRIDE {}
+  void set_fixed_size(gfx::Size size) { surface_size_ = size; }
 };
 
 TEST_F(GLRendererTest, NoDiscardOnPartialUpdates) {
@@ -1674,7 +1674,7 @@
 
   MOCK_METHOD0(EnsureBackbuffer, void());
   MOCK_METHOD0(DiscardBackbuffer, void());
-  MOCK_METHOD2(Reshape, void(const gfx::Size& size, float scale_factor));
+  MOCK_METHOD2(Reshape, void(gfx::Size size, float scale_factor));
   MOCK_METHOD0(BindFramebuffer, void());
   MOCK_METHOD1(SwapBuffers, void(CompositorFrame* frame));
 };