During virtual context switches only restore texture units that have changed from the previous cont…

gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc

Index: gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
diff --git a/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc b/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
index 910cb0104b214ec80de4dd7872f5a70f1904a145..68aa88b058466ab9decf34d037c1ae6d38c089e3 100644
--- a/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
+++ b/gpu/command_buffer/service/gles2_cmd_decoder_unittest.cc
@@ -8820,6 +8820,26 @@ TEST_F(GLES2DecoderTest, DiscardFramebufferEXTUnsupported) {
   EXPECT_EQ(GL_INVALID_OPERATION, GetGLError());
 }
 
+TEST_F(GLES2DecoderManualInitTest, RestoreState) {
+  InitDecoder(
+      "",      // extensions
+      false,   // has alpha
+      false,   // has depth
+      false,   // has stencil
+      false,   // request alpha
+      false,   // request depth
+      false,   // request stencil
+      true);   // bind generates resource
+  SetupTexture();
+  // TODO(kaanb): do not hardcode size
+  for (int i = 0; i < 8; ++i) {
+    EXPECT_CALL(*gl_, ActiveTexture(GL_TEXTURE0 + i))
+        .Times(1)
+        .RetiresOnSaturation();
+  }
+  GetDecoder()->RestoreState(NULL);
+}
+
 // TODO(gman): Complete this test.
 // TEST_F(GLES2DecoderTest, CompressedTexImage2DGLError) {
 // }