Implementing FlushMappedBufferRange in GPU command buffer.

gpu/command_buffer/client/gles2_implementation_unittest_autogen.h

Index: gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
diff --git a/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h b/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
index 8507032b7e0adb84419fd9d225eb445fd32e7c67..e0b5487a5e25b47faf058802038beff56c1daa98 100644
--- a/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
+++ b/gpu/command_buffer/client/gles2_implementation_unittest_autogen.h
@@ -2679,6 +2679,17 @@ TEST_F(GLES2ImplementationTest, IsVertexArrayOES) {
   EXPECT_TRUE(result);
 }
 
+TEST_F(GLES2ImplementationTest, FlushMappedBufferRange) {
+  struct Cmds {
+    cmds::FlushMappedBufferRange cmd;
+  };
+  Cmds expected;
+  expected.cmd.Init(GL_ARRAY_BUFFER, 2, 3);
+
+  gl_->FlushMappedBufferRange(GL_ARRAY_BUFFER, 2, 3);
+  EXPECT_EQ(0, memcmp(&expected, commands_, sizeof(expected)));
+}
+
 TEST_F(GLES2ImplementationTest, ResizeCHROMIUM) {
   struct Cmds {
     cmds::ResizeCHROMIUM cmd;