gpu: Add base class for gpu service tests

gpu/command_buffer/service/vertex_attrib_manager_unittest.cc

Index: gpu/command_buffer/service/vertex_attrib_manager_unittest.cc
diff --git a/gpu/command_buffer/service/vertex_attrib_manager_unittest.cc b/gpu/command_buffer/service/vertex_attrib_manager_unittest.cc
index 27d1ee42c3ab9442d7f5c67325e3545d3aefaf45..e7fd690547423e53da5eb990f2c8224845838bdd 100644
--- a/gpu/command_buffer/service/vertex_attrib_manager_unittest.cc
+++ b/gpu/command_buffer/service/vertex_attrib_manager_unittest.cc
@@ -8,6 +8,7 @@
 #include "gpu/command_buffer/service/buffer_manager.h"
 #include "gpu/command_buffer/service/error_state_mock.h"
 #include "gpu/command_buffer/service/feature_info.h"
+#include "gpu/command_buffer/service/gpu_service_test.h"
 #include "gpu/command_buffer/service/test_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gl/gl_mock.h"
@@ -18,7 +19,7 @@ using ::testing::_;
 namespace gpu {
 namespace gles2 {
 
-class VertexAttribManagerTest : public testing::Test {
+class VertexAttribManagerTest : public GpuServiceTest {
  public:
   static const uint32 kNumVertexAttribs = 8;
 
@@ -30,8 +31,7 @@ class VertexAttribManagerTest : public testing::Test {
 
  protected:
   virtual void SetUp() {
-    gl_.reset(new ::testing::StrictMock< ::gfx::MockGLInterface>());
-    ::gfx::MockGLInterface::SetGLInterface(gl_.get());
+    GpuServiceTest::SetUp();
 
     for (uint32 ii = 0; ii < kNumVertexAttribs; ++ii) {
       EXPECT_CALL(*gl_, VertexAttrib4f(ii, 0.0f, 0.0f, 0.0f, 1.0f))
@@ -43,14 +43,6 @@ class VertexAttribManagerTest : public testing::Test {
     manager_->Initialize(kNumVertexAttribs, true);
   }
 
-  virtual void TearDown() {
-    manager_ = NULL;
-    ::gfx::MockGLInterface::SetGLInterface(NULL);
-    gl_.reset();
-  }
-
-  // Use StrictMock to make 100% sure we know how GL will be called.
-  scoped_ptr< ::testing::StrictMock< ::gfx::MockGLInterface> > gl_;
   scoped_refptr<VertexAttribManager> manager_;
 };