cc: Make LayerTreeHostImpl unittests use a delegating output surface.

cc/output/shader_unittest.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/output/shader.h"
 
 #include "cc/test/test_gles2_interface.h"
 #include "cc/test/test_web_graphics_context_3d.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/geometry/point.h"
 #include "ui/gfx/geometry/size.h"
 
 namespace cc {
 
 TEST(ShaderTest, HighpThresholds) {
   // The test context always uses a mediump precision of 10 bits which
   // corresponds to a native highp threshold of 2^10 = 1024
-  std::unique_ptr<TestWebGraphicsContext3D> stub_context =
+  std::unique_ptr<TestWebGraphicsContext3D> test_context =
       TestWebGraphicsContext3D::Create();
-  TestGLES2Interface stub_gl(stub_context.get());
+  TestGLES2Interface test_gl;
+  test_gl.set_test_context(test_context.get());
 
   int threshold_cache = 0;
   int threshold_min;
   gfx::Point closePoint(512, 512);
   gfx::Size smallSize(512, 512);
   gfx::Point farPoint(2560, 2560);
   gfx::Size bigSize(2560, 2560);
 
   threshold_min = 0;
   EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
-            TexCoordPrecisionRequired(&stub_gl, &threshold_cache, threshold_min,
+            TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
                                       closePoint));
   EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
-            TexCoordPrecisionRequired(&stub_gl, &threshold_cache, threshold_min,
+            TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
                                       smallSize));
   EXPECT_EQ(TEX_COORD_PRECISION_HIGH,
-            TexCoordPrecisionRequired(&stub_gl, &threshold_cache, threshold_min,
+            TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
                                       farPoint));
   EXPECT_EQ(TEX_COORD_PRECISION_HIGH,
-            TexCoordPrecisionRequired(&stub_gl, &threshold_cache, threshold_min,
+            TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
                                       bigSize));
 
   threshold_min = 3000;
   EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
-            TexCoordPrecisionRequired(&stub_gl, &threshold_cache, threshold_min,
+            TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
                                       closePoint));
   EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
-            TexCoordPrecisionRequired(&stub_gl, &threshold_cache, threshold_min,
+            TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
                                       smallSize));
   EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
-            TexCoordPrecisionRequired(&stub_gl, &threshold_cache, threshold_min,
+            TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
                                       farPoint));
   EXPECT_EQ(TEX_COORD_PRECISION_MEDIUM,
-            TexCoordPrecisionRequired(&stub_gl, &threshold_cache, threshold_min,
+            TexCoordPrecisionRequired(&test_gl, &threshold_cache, threshold_min,
                                       bigSize));
 }
 
 }  // namespace cc