Cleanup: Update TestObject.h to Chromium style.

content/shell/tools/plugin/test_object.h

Index: content/shell/tools/plugin/test_object.h
diff --git a/content/shell/tools/plugin/TestObject.h b/content/shell/tools/plugin/test_object.h
similarity index 86%
rename from content/shell/tools/plugin/TestObject.h
rename to content/shell/tools/plugin/test_object.h
index adf30788de96a16b305c7e3d5aee63d6a554316c..a71c336314b77c19dfc6976e8e2d5c54daf87285 100644
--- a/content/shell/tools/plugin/TestObject.h
+++ b/content/shell/tools/plugin/test_object.h
@@ -27,8 +27,17 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#ifndef CONTENT_SHELL_TOOLS_PLUGIN_TEST_OBJECT_H_
+#define CONTENT_SHELL_TOOLS_PLUGIN_TEST_OBJECT_H_
+
 #include <bindings/npapi.h>
 #include <bindings/npruntime.h>
 
-NPClass* getTestClass(void);
-int getTestObjectCount();
+namespace content {
+
+NPClass* GetTestClass();
+int GetTestObjectCount();
+
+}  // namespace content
+
+#endif  // CONTENT_SHELL_TOOLS_PLUGIN_TEST_OBJECT_H_